What is buying pressure?
"Buying pressure is when there are more buy orders than sell orders outstanding.  Just because someone wants to buy a stock doesn't mean there's a seller ready to fill that order.  When there's buying pressure, stock prices rise.  When there's selling pressure, stock prices fall. There can be high volume where buying and selling are roughly equal, in which case share prices wouldn't move much. The market makers who actually fill buy and sell orders for stock will raise share prices in the face of buying pressure and lower them in the face of selling pressure.  That's because they get to keep the margin between what they bought shares from a seller for and what they can sell them to a new buyer for.  Here's an explanation from InvestorPlace.com about ""buying pressure"": Buying pressure can basically be defined as increasingly higher demand for a particular stock's shares. This demand for shares exceeds the supply and causes the price to rise. ... The strength or weakness of a stock determines how much buying or selling interest will be required to break support and resistance areas. I hope this helps!" Buying pressure means there are more interested buyers than there are ready sellers putting upward pressure on prices. That might include institutional buyers who are slowly executing buy orders because they still want the best prices possible without clearing out the market. Buying pressure doesn't have to be related to volume at all. If everyone who owns shares think they are going to be worth far more than recent market prices, they will not offer them for sale. That means there is more demand to buy than there is a supply of shares to be bought. That condition can exist regardless of trading volume.
VaR and Stressed VaR are kind of mandatory market risk measurement techniques for anyone with a banking licence in Europe. This doesn't stop you from doing other stuff as well, but you need to have the basics (Basel 2 accord) and you must backtest to check your model. The big problem is that doesn't really account for what happens during a liquidity squeeze.  Other measures may be used at portfolio level, but it is the basic VaR stuff that is churning away after hours. "There are two distinct questions that may be of interest to you. Both questions are relevant for funds that need to buy or sell large orders that you are talking about. The answer depends on your order type and the current market state such as the level 2 order book. Suppose there are no iceberg or hidden orders and the order book (image courtesy of this question) currently is:  An unlimited (""at market"") buy order for 12,000 shares gets filled immediately: it gets 1,100 shares at 180.03 (1,100@180.03), 9,700 at 180.04 and 1,200 at 180.05. After this order, the lowest ask price becomes 180.05 and the highest bid is obviously still 180.02 (because the previous order was a 'market order'). A limited buy order for 12,000 shares with a price limit of 180.04 gets the first two fills just like the market order: 1,100 shares at 180.03 and 9,700 at 180.04. However, the remainder of the order will establish a new bid price level for 1,200 shares at 180.04. It is possible to enter an unlimited buy order that exhausts the book. However, such a trade would often be considered a mis-trade and either (i) be cancelled by the broker, (ii) be cancelled or undone by the exchange, or (iii) hit the maximum price move a stock is allowed per day (""limit up""). Funds and banks often have to buy or sell large quantities, just like you have described. However they usually do not punch through order book levels as I described before. Instead they would spread out the order over time and buy a smaller quantity several times throughout the day. Simple algorithms attempt to get a price close to the time-weighted average price (TWAP) or volume-weighted average price (VWAP) and would buy a smaller amount every N minutes. Despite splitting the order into smaller pieces the price usually moves against the trader for many reasons. There are many models to estimate the market impact of an order before executing it and many brokers have their own model, for example Deutsche Bank. There is considerable research on ""market impact"" if you are interested. I understand the general principal that when significant buy orders   comes in relative to the sell orders price goes up and when a   significant sell order comes in relative to buy orders it goes down. I consider this statement wrong or at least misleading. First, stocks can jump in price without or with very little volume. Consider a company that releases a negative earnings surprise over night. On the next day the stock may open 20% lower without any orders having matched for any price in between. The price moved because the perception of the stocks value changed, not because of buy or sell pressure. Second, buy and sell pressure have an effect on the price because of the underlying reason, and not necessarily/only because of the mechanics of the market. Assume you were prepared to sell HyperNanoTech stock, but suddenly there's a lot of buzz and your colleagues are talking about buying it. Would you still sell it for the same price? I wouldn't. I would try to find out how much they are prepared to buy it for. In other words, buy pressure can be the consequence of successful marketing of the stock and the marketing buzz is what changes the price." Options are an indication what a particular segment of the market (those who deal a lot in options) think will happen. (and just because people think that, doesn't mean it will)  Bearing in mind however that people writing covered-calls may due so simply as part of a strategy to mitigate downside risk at the expense of limiting upside potential.  The presence of more people offering up options is to a degree an indication they are thinking the price will fall or hold steady, since that is in effect the 'bet' they are making.  OTOH the people buying those options are making the opposite bet.. so who is to say which will be right.  The balance between the two and how it affects the price of the options could be taken as an indication of market sentiment (within the options market) as to the future direction the stock is likely to take. (I just noticed that Blackjack posted the forumula that can be used to model all of this)  To address the last part of your question 'does that mean it will go lower' I would say this.  The degree to which any of this puts actual pressure on the stock of the underlying instrument is highly debatable, since many (likely most) people trading in a stock never look at what the options for that stock are doing, but base their decision on other factors such as price history, momentum, fundamentals and recent news about the company.  To presume that actions in the options market would put pressure on a stock price, you would need to believe that a signficant fraction of the buyers and sellers were paying attention to the options market.  Which might be the case for some Quants, but likely not for a lot of other buyers.   And it could be argued even then that both groups, those trading options, and those trading stocks, are both looking at the same information to make their predictions of the likely future for the stock, and thus even if there is a correlation between what the stock price does in relation to options, there is no real causality that can be established.  We would in fact predict that given access to the same information, both groups would by and large be taking similar parallel actions due to coming to similar conclusions regarding the future price of the stock.  What is far MORE likely to pressure the price would be just the shear number of buyers or sellers, and also (especially since repeal of the uptick rule) someone who is trying to actively drive down the price via a lot of shorting at progressively lower prices.  (something that is alleged to have been carried out by some hedge fund managers in the course of 'bear raids' on particular companies) Investopedia defines it in the following way: It's essentially a market order that doesn't get entered until the last minute (or thereabouts) of trading. With this type of order you are not necessarily guaranteed the closing price but usually something very similar, depending on the liquidity in the market and bid-ask for the security in question. Traders who believe that a security or market will move more heavily during the last few minutes of trading will often place such an order in the hopes of having their order filled at a more desirable price. When you buy a futures contract you are entering into an agreement to buy gold, in the future (usually a 3 month settlement date).  this is not an OPTION, but a contract, so each party is taking risk, the seller that the price will rise, the buyer that the price will fall.  Unlike an option which you can simply choose not to exercise if the price goes down, with futures you are obligated to follow through. (or sell the contract to someone else, or buy it back)  The price you pay depends on the margin, which is related to how far away the settlement date is, but you can expect around 5% , so the minimum you could get into is 100 troy ounces, at todays price, times 5%.  Since we're talking about 100 troy ounces, that means the margin required to buy the smallest sized future contract would be about the same as buying 5 ounces of gold.  roughly $9K at current prices. If you are working through a broker they will generally require you to sell or buy back the contract before the settlement date as they don't want to deal with actually following through on the purchase and having to take delivery of the gold.  How much do you make or lose? Lets deal with a smaller change in the price, to be a bit more realistic since we are talking typically about a settlement date that is 3 months out. And to make the math easy lets bump the price of gold to $2000/ounce.  That means the price of a futures contract is going to be $10K   Lets say the price goes up 10%,  Well you have basically a 20:1 leverage since you only paid 5%, so you stand to gain $20,000. Sounds great right?  WRONG.. because as good as the upside is, the downside is just as bad.  If the price went down 10% you would be down $20000, which means you would not only have to cough up the 10K you committed but you would be expected to 'top up the margin' and throw in  ANOTHER $10,000 as well.  And if you can't pay that up your broker might close out your position for you. oh and if the price hasn't changed, you are mostly just out the fees and commissions you paid to buy and sell the contract.  With futures contracts you can lose MORE than your original investment.  NOT for the faint of heart or the casual investor.  NOT for folks without large reserves who can afford to take big losses if things go against them.  I'll close this answer with a quote from the site I'm linking below The large majority of people who trade futures lose their money.   That's a fact. They lose even when they are right in the medium term,   because futures are fatal to your wealth on an unpredicted and   temporary price blip. Now consider that, especially the bit about 'price blip' and then look at the current volatility of most markets right now, and I think you can see how futures trading can be as they say 'Fatal to your Wealth' (man, I love that phrase, what a great way of putting it)  This Site has a pretty decent primer on the whole thing. their view is perhaps a bit biased due to the nature of their business, but on the whole their description of how things work is pretty decent.  Investopedia has a more detailed (and perhaps more objective) tutorial on the futures thing.  Well worth your time if you think you want to do anything related to the futures market. Inflation also provides incentives for consumers to purchase now rather than later (which helps drive sales) and it provides incentive for money to be invested and put back into businesses, rather than held as cash, because you need to earn at least a little interest on your money just to break even. "During market hours, there are a lot of dealers offering to buy and sell all exchange traded stocks. Dealers don't actually care about the company's fundamentals and they set their prices purely based on order flow. If more people start to buy than sell, the dealer notices his inventory going down and starts upping the price (both his bid and ask). There are also traders who may not be ""dealers"", but are willing to sell if the price goes high enough or buy if the price goes low enough. This keeps the prices humming along smoothly. During normal trading hours, if you buy something and turn around and sell it two minutes later, you'll probably be losing a couple cents per share. Outside normal market hours, the dealers who continue to have a bid and ask listed know that they don't have access to good price information --  there isn't a liquid market of continuous buying and selling for the dealer to set prices he considers safe. So what does he do? He widens the spread. He doesn't know what the market will open tomorrow at and doesn't know if he'll be able to react quickly to news. So instead of bidding $34.48 and offering at $34.52, he'll move that out to $33 and $36. The dealer still makes money sometimes off this because maybe some trader realized that he has options expiring tomorrow, or a short position that he's going to get a margin call on, or some kind of event that pretty much forces him to trade. Or maybe he's just panicking and overreacting to some news. So why not trade after hours? Because there's no liquidity, and trading when there's no liquidity costs you a lot." My in-laws are pressuring me to buy a home.  I don't really have much financial experience. In fact, I'm a nightmare with finances. I almost have my student loans payed off from school.  My in-laws and husband are great with finances and with real-estate.  My husband has a good job and $200k in savings.  I have a good job too, and still have some debt from school. (approx $60k left of 180k).   They say the house will be available in Jan or February for purchase, and that we should really try to buy it (prob $2-3 mil).   My guess is they want to make it available to us off the market (which is a huge benefit in this area,  there are really no houses available lately) .   The problem is:  I am uncomfortable because I don't have all of my loans payed off,  I could divert money away from paying off the loans in order to save for a larger downpayment. I just got a bonus of $35k (after taxes)   I don't think I'll have all of my loans payed off by January. Should I save my money for the downpayment or focus on my loans, should I go for the house?  I don't know how to weigh these options against each other with such little experience. Buying stocks is like an auction. Put in the price you want to pay and see if someone is willing to sell at that price.  Thing to remember about after hours trading; There is a lot less supply so there's always a larger bid/ask price spread. That's the price brokers charge to handle the stocks they broker over and above the fee.  That means you will always pay more after the market closes. Unless it is bad news, but I don't think you want to buy when that happens. I think a lot of the after market trading is to manipulate the market. Traders drive up the price overnight with small purchases then sell their large holdings when the market opens. December, 9, 2011 (01:30pm) :- Gold &amp; Silver are faced to be highest selling pressure by the investors and by the daily traders after the release of initial claim data.  Initial claims are least at 3,81,000 as comparing from the last 9 month data's.  Gold &amp; Silver trend totally negative side because Gold breaks their important support at $ 1728 which is also broke yesterday.  Under $ 1728 Gold trend totally down for Short term.  Silver have support at $ 32, which is already broke yesterday &amp; also strong resistance at $ 32.60.  On Wednesday we saw that Big investors sold around 3500 Kg approx Gold &amp; bought 30,000 Kg Silver. From your question and how you have framed it, I get you find Agressive Sales tactics disturb the buying process for you. ;) I understand because I also find the whole process of Research / Negotiating / Buying / Owning / Using is all on one continuum, so anything that ruins the process will likely lose the sale or enjoyment of the item, at the end of the day.  [Very long answer .... Sorry :) ] The answer to this is to KNOW what you want before you have to deal with the Sales people. A good Sales person likes a customer who knows what they want. I would suggest that you follow my 'Buying Process' (Much you have already done) : Before you Buy: Identify the item you want and the max/min 'realistic' price you  would buy at. [Stick to this price else 'Buyers Remorse' may bite  later.] Write the questions you have down on paper before you visit the    Dealer. Write the answers you want on the same list, if known. Decide which questions are most important and therefore must get the  answer you want. These should be the questions you ask first. Mark  these on the list. Re-visit points 1-3 are they complete and to your satisfaction ? Would you buy if all the answers & the price are right ? If NO then re-visit point 1-3 else you are not ready to buy now !!! If YES then Organise your visit to the Dealer. [Book appointment etc if needed.] At Dealer: Meet your Sales person and clearly state what you want (the item) and importantly when you intend to buy, if all your questions are answered to your satisfaction.  There is no need to discuss price at this point as the 'haggling' is only possible IF the questions are answered to your satisfaction. Do not give information such as your maximum budget or similar requests, as they give the sales person the upper hand to maximise his/her pricing.  If asked state that your budget is conditional on the answers you get. As the questions are answered assess the answer and assign +/- to the question on your list. If any of your most critical / important questions are answered in the negative, they are the reasons you have to call it a day and walk out. You can assess whether they are worth ignoring but you will need to factor this into your price and if you have identified your questions correctly there should be little room for debate. Assuming you have got all your questions answered you should know what you are buying and have assessed what is a reasonable price for it, if you still want it as this point.  If you have lost interest, say so and let the Sales person go. Don't waste their time. They may make some sort of offer to you BUT don't forget that if you have doubts now they will not go away easily no matter what the 'great' price is. If you want it then continue. Buying your Item: [None of the following is really usefull if you have told the Sales person your Budget, as they will be aiming for the highest end of your budget. You will often find that the best price is very close to your maximum budget !!! :)] Do not forget your realistic price range, this should limit your buying price no matter what tactics are used by the Sales person. Only you know what you are prepared to pay and if an extra 1% or 50% is considered worth it to you, if you have to have the item :) Regardless, you have to have some idea of your limit and be prepared to stick to it. You must be able to walk away if the price is silly and not worth it. Assuming you have not been smitten by your item and funds are NOT unlimited, ask for the price and assess it against your price range. At this point I can only offer pointers as there are no 'magic' rules to get what you want at the lowest price. The only advice I would offer is that you will be lucky to get something at your 1st offer price unless the seller really needs to sell, because of this your 1st offer should be less than your price range lowest band. You will need to assess how much less but be prepared to get a 'No' response. If you get a 'Yes' and your research is good 'Buy It !!!' If you get too enthusiastic a response, question your research & if not sure bail out [No Sale] :) At this point you are likely to be 'Haggling' so you need to be ready for all the 'Must buy Now' tactics. If you have clearly stated your wants and timescales there is no reason to be pulled in by these tactics and they can be ignored until the price has reached the level you are happy with. If the price is not moving where you want than clearly state you cannot 'buy at that price'. If you get a total stop and no movement than you need to assess your 'need' and if priced too high then you should walk out. Remember if you stated that you had a timescale to buy of 1/2/3 weeks you should act like you have 1/2/3 weeks to keep looking. Any eagerness on your part will tell the Sales person that you have lied !!! :) You can always come back and try again, reminding the Sales person that the 'item' is still there and perhaps it is priced too high to sell and make the same offer. !!! (A bit of cheek sometimes works.) If the price is close and you still want it and the Sales person is not moving you need to try walking out while stating that you would love the 'item' if it was priced better, if no improved offer as you go, try an increased offer but again you need to assess how much and remember you can only go up, or walk out and come back another day. If the price is at a level you are happy with then you should have no reason not to buy (if you have followed this process) but this does not mean that you should be forced into buying now if you do not want to. Regardless of any 'Must buy now' tactics if the price is right and you cannot buy now, tell the Sales person when you CAN buy and see if you can get an agreement with this. It is unfair to expect a price to be held for an indeterminate time, so you do need to state when you could buy if not now when a price has been agreed. This is a point where the deal may break down if the Sales person thinks they have a sale and trys to force the Sale now. Once again you have to assess your 'need' and whether buying now is better than walking out. If the deal breaks down there is nothing stopping you from coming back and offering the same price when you can buy. A final option is to agree if a deposit can be left to reserve the item until you can buy. This gives the Sales person some assurance that you will come back and is sometimes NON-Refundable unless you agree otherwise before you pay, so check this detail first. (This tends to be smaller Dealers but generally in the UK the large companies offer refundable deposits as part of their Customer Service, the advantage of using larger Stores/Dealers etc.) Apologies for the epic reply, hope it helps. "You have heard the old adage ""Buy low, sell high"", right? That sounds so obvious that you'd have to wonder why they would ever bother coining such an expression. It should rank up there with ""Don't walk in front of a moving car"" on the Duh scale of advice. Well, your question demonstrates exactly why it isn't quite so obvious in the real world and that people need to be reminded of it.  So, in your example, the stock prices are currently low (relative to what they have been). So per that adage, do you sell or buy when prices are low? Hint: It isn't sell. Yes. Your gut is going to tell you the exact opposite thanks to the fact that our brains are unfortunately wired to make us susceptible to the loss aversion fallacy. When the market has undergone a big drop is the WORST time to stop contributing (buying stocks).  This example might help get your brain and gut to agree a little more easily: If you were talking about any other non-investment commodity, cars for instance.  Your question equates to.. I really need a car, but the prices have been dropping like crazy lately.    Maybe I should wait until the car dealers start raising their prices again before I buy one. Dollar Cost Averaging As littleadv suggested, if you have an automatic payroll deduction for your retirement account, you are getting the benefit of Dollar Cost Averaging. Because you are investing the same amount on a scheduled interval, you are buying more shares when they are cheap and fewer when they are expensive. It is like an automatic buy low strategy is built into the account. The alternative, which you are implying, is a market timing strategy. Under this strategy, instead of investing regularly you try to get in and out of investments right before they go up/drop. There are two MAJOR flaws with this approach:   1) Your brain will work against you (see above) and encourage you to do the exact opposite of what you should be doing.   2) Unless you are clairvoyant, this strategy isn't much better than gambling. If you are lucky it can work, but because of #1, the odds are stacked against you." There is no such thing as buying at the best price. That only exists in hindsight. If you could consistently predict the lower bound, then you would have no reason to waste your time investing. Quit your job and bet with all leverage in. What if the price never reaches your lower bound and the market keeps rallying? What if today is crash day and you catch a falling knife? I'd say the best strategy would be just buy at whatever the market price is the moment your investment money hits your account with the smallest possible commission. "Your question contains a faulty assumption: During crashes and corrections the amount of sellers is of course higher than the amount of buyers, making it difficult to sell stocks. This simply isn't true.  Every trade has two sides; thus, by definition, for every seller there is buyer and vice versa.  Even if we broaden the definition of ""buyers"" and ""sellers"" to mean ""people willing to buy (or sell) at some price"", the assumption still isn't true.  When a stock is falling it is generally not because potential buyers are exiting the market; it is because they are revising the prices they are willing to buy at downward.   For example, say there are a bunch of orders to buy Frobnitz Consolidated (DUMB) at $5. Suppose DUMB announces a downward revision to its earnings guidance. Those people might not be willing to buy at $50 anymore, so they'll probably cancel their $50 buy orders.  However, just because DUMB isn't worth as much as they thought it was, that doesn't mean it's completely worthless.  So, those prospective buyers will likely enter new orders at some lower value, say, $45.  With that, the value of DUMB has just dropped by $5, a 10% correction.  However, there are still plenty of buyers, and you can still sell your DUMB holdings, if you're willing to take $45 for them. In other words, the value of a security is not determined by the relative numbers of buyers and sellers.  It is determined by the prices those buyers and sellers are willing to pay to buy or accept to sell.  Except for cases of massive IT disruptions, such as we saw in the ""flash crash"", there is always somebody willing to buy or sell at some price." Running for-profit business doesn't pressure those involved to make the best product, it pressures them to make the best profit.  Making the best profit pressures those involved to produce the cheapest product that the market won't reject marked at the highest price the market won't reject.  Private companies have the freedom to avoid or limit the effect of that pressure if they choose, and sacrifice some profit for quality and improved customer satisfaction (though many still choose profit).  Public companies, who are eventually beholdent to shareholders who sole goal is profitability, are much less likely to avoid the pressures to increase profits at all costs;  particularly in the age of day traders and CEO merry-go-round, long-term planning is very difficult when short-term profitability is on the line.  A company that made one widget a year for $1 and sold that widget for $10 billion would be a very successful company from the profit standpoint, and would likely have an excellent share price if the business model looked secure for the next year or two.  Competition helps alleviate this morass and pushes for better products and lower prices by upping the bar of what the market will reject over time - increase the available alternatives, and the features/quality/price scale shifts.  The importance of having a level playing field, anti-monopoly laws and ensure that new players can come onto the scene is fundamental to capitalism working - otherwise those who hold monopoly positions will prevent competition from emerging and charge as much as is possible for the cheapest product people will still buy.  This is of particular issue when not buying the product is a threat to one's life or safety (medical care, emergency services, food, etc).