Market Making vs Market Taking (Quotes vs Orders)
Quote driven markets are the predecessors to the modern securities market. Before electronic trading and HFTs specifically, trading was thin and onerous.  Today, the average investor can open up a web page, type in a security, and buy at the narrowest spread permitted by regulators with anyone else who wants to take the other side. Before the lines between market maker and speculator became blurred to indistinction, a market maker was one who was contractually obligated to an exchange to provide a bid and ask for a given security on said exchange even though at heart a market maker is still simply a trader despite the obligation.  A market maker would simultaneously buy a large amount of securities privately and short the same amount to have no directional bias, exposure to the direction of the security, and commence to making the market.  The market maker would estimate its cost basis for the security based upon those initial trades and provide a bid and ask appropriate for the given level of volume.  If volumes were high, the spread would be low and vice versa. Market makers who survived crashes and spikes would forgo the potential profit in always providing a steady price and spread, ie increased volume otherwise known as revenue, to maintain no directional bias.  In other words, if there were suddenly many buyers and no sellers, hitting the market maker's ask, the MM would raise the ask rapidly in proportion to the increased exposure while leaving the bid somewhere below the cost basis.  Eventually, a seller would arise and hit the MM's bid, bringing the market maker's inventory back into balance, and narrowing the spread that particular MM could provide since a responsible MM's ask could rise very high very quickly if a lack of its volume relative to its inventory made inventory too costly.  This was temporarily extremely costly to the trader if there were few market makers on the security the trader was trading or already exposed to. Market makers prefer to profit from the spread, bidding below some predetermined price, based upon the cost basis of the market maker's inventory, while asking above that same predetermined cost basis.  Traders profit from taking exposure to a security's direction or lack thereof in the case of some options traders. Because of electronic trading, liquidity rebates offered by exchanges not only to contractually obligated official market makers but also to any trader who posts a limit order that another trader hits, and algorithms that become better by the day, market making HFTs have supplanted the traditional market maker, and there are many HFTs where there previously were few official market makers.  This speed and diversification of risk across many many algorithmically market making HFTs have kept spreads to the minimum on large equities and have reduced the same for the smallest equities on major exchanges. Orders and quotes are essentially identical.  Both are double sided auction markets with impermenant bids and asks.  The difference lies in that non-market makers, specialists, etc. orders are not shown to the rest of the market, providing an informational advantage to MMs and an informational disadvantage to the trader.  Before electronic trading, this construct was of no consequence since trader orders were infrequent.  With the prevalence of HFTs, the informational disadvantage has become more costly, so order driven markets now prevail with much lower spreads and accelerated volumes even though market share for the major exchanges has dropped rapidly and hyperaccelerated number of trades even though the size of individual trades have fallen. The worst aspect of the quote driven market was that traders could not directly trade with each other, so all trades had to go between a market maker, specialist, etc.  While this may seem to have increased cost to a trader who could only trade with another trader by being arbitraged by a MM et al, paying more than what another trader was willing to sell, these costs were dwarfed by the potential absence of those market makers.  Without a bid or ask at any given time, there could be no trade, so the costs were momentarily infinite. In essence, a quote driven market protects market makers from the competition of traders.  While necessary in the days where paper receipts were carted from brokerage to brokerage, and the trader did not dedicate itself to round the clock trading, it has no place in a computerized market.  It is more costly to the trader to use such a market, explaining quote driven markets' rapid exit. This is too lengthy for a comment. The following quoted passages are excerpted from this Money SE post. Before electronic trading and HFTs specifically, trading was thin and   onerous. No. The NYSE and AMEX were deep, liquid and transparent for nearly 75 years prior to high frequency trading (HFT), in 2000 or so. The same is true for NASDAQ, but not for as many years, as NASDAQ is newer, being an electronic market. The point is that it existed, and thrived, prior to HFT. The NASDAQ can be active and functional, WITH or WITHOUT high frequency trading.  This is not historically true, nor is it true now:  Without a bid or ask at any given time, there could be no trade... Market makers, also known as specialists, were responsible for hitting the bid and taking the offer on whatever security they covered. They had a responsibility assigned to them by the exchange. Yes, it was lucrative! There was risk, and they were rewarded for bearing it. There is a trade-off though. Specialists provided greater stability on a systemic level, although other market participants paid for that cost. Prior to HFT, traders who were not market makers were often bounded by, boxed in, by the toll paid to market makers. Market makers had different, much higher capital and solvency requirements than other traders. Most specialists/market makers had seats, or shared a seat on the NYSE or AMEX. Remember that market makers/specialists are specific to stock markets, whereas HFT is not. If this is true, then we are in trouble: HFTs have supplanted the traditional market maker Why? Because trading volume is LOWER now than it was in the 1990's! EDIT In the comments, I noticed that OP was asking about the difference between  I suggest reading this very accurate, well-written answer to a related question, The spread goes to the market maker, is the market maker the exchange? That explains the difference between
At any point of time, buyer wants to purchase a stock at lesser price and seller wants to sell the stock at a higher price.  Let's consider this scenario  Company XYZ is trading at 100$, as stated above buyer wants to purchase at lower price and seller at higher price, this information will be available in Market depth, let's consider there are 5 buyers and 5 sellers, below are the details of their orders Buyers List Sellers List Highest order in buyers list will contain the bid price and bid quantity, Lowest order in Sellers list will contain the offer price and offer quantity. Now, if I want to buy 50 Stocks of company XYZ, need to place an order first, it can be either limit or Market. Limit Order : In this order, I will mention the price(buy price) at which I wish to buy, if there is any seller selling the stock less than or equal to price I have mentioned, then the order will be executed else it will be added to buyers list Market Order : In this order, I will not mention the price, if I wish to purchase 50 Stocks, then it will find the lowest offer price and buy stocks, in our case it will be 101. if I wish to purchase 200 Stocks, then it will find the lowest offer price and buy stocks, in our case it will be 2 transactions, since entire request cannot be accommodated in single order Usually the volume(Ask Volume and Offer Volume) being displayed are all Limit orders and not Market orders, Market orders are executed immediately. This is just an example, However several transactions are executed within a second, hence we will get to know the exact value only after the order is completed(executed) You don't see Buying and Selling. You see Bid and Ask. Best Bid--Highest Price someone is willing to pay to buy a stock. Best Ask - Lowest price someone is willing to accept to sell a stock. As for your second question, if you can look up Accumulation/Distribution Algorithm and Iceberg Order, you will get basic idea. "Consider the futures market. Traders buy and sell gold futures, but very few contracts, relatively speaking, result in delivery. The contracts are sold, and ""Open interest"" dwindles to near zero most months as the final date approaches. The seller buys back his short position, the buyer sells off his longs.  When I own a call, and am 'winning,' say the option that cost me $1 is now worth $2, I'd rather sell that option for even $1.95 than to buy 100 shares of a $148 stock. The punchline is that very few option buyers actually hope to own the stock in the end. Just like the futures, open interest falls as expiration approaches." "Market orders do not get priority over limit orders.  Time is the only factor that matters in price/time order matching when the order price is the same. For example, suppose the current best available offer for AAPL is $100.01 and the best available bid is $100.00.  Now a limit buy for $100.01 and a market buy arrive at around the same instant.  The matching engine can only receive one order at a time, no matter how close together they arrive. Let's say that by chance the limit buy arrives first.  The engine will check if there's a matching sell at $100.01 and indeed there is and a trade occurs.  This all happens in an instant before the matching engine ever sees the market buy.  Then it moves on to the market buy and processes it accordingly. On the other hand, let's say that by chance the market buy arrives first.  The engine will match it with the best available sell (at $100.01) and a trade occurs.  This all happens in an instant before the matching engine ever sees the limit buy.  Then it moves on to the limit buy and processes it accordingly. So there's never a comparison between the two orders or their ""priorities"" because they never exist in the system at the same time.  The first one to arrive is processed first; the second one to arrive is processed second." If you are the only one who puts in a large market buy order, then it would definitely push the price up. How much up would depend on how many would be willing to sell at what price point. It would also be possible that your trade will not get executed as there are no sellers. The same would be true if you put in a large sell order, with no buyers. The price would go down or trade not get executed as there aren't enough buyers. Rule 610 (Google for it) stands that if Bid and Ask are the same, the market is considered Locked, and the exchange must stop all trading. So the same person can't quote the same bid and ask price. However, HFTs have found ways to circumvent this limitation when exchanges created special order types for them, e.g. Spam-and-Cancel "Most of the time* you're selling to other investors, not back to the company. The stock market is a collection of bid (buy offers) and asks (sell offers). When you sell your stock as a retail investor at the ""market"" price you're essentially just meeting whatever standing bid offers are on the market.  For very liquid stocks (e.g. Apple), you can pretty much always get the displayed price because so many stocks are being traded. However during periods of very high volatility or for low-volume stocks, the quoted price may not be indicative of what you actually pay.  As an example, let's say you have 5 stocks you're trying to sell and the bid-side order book is 2 stocks for $105, 2 for $100, and 5 for $95. In this scenario the quoted price will be $105 (the best bid price), but if you accept market price you'll settle 2 for 105, 2 for 100, and 1 for 95. After your sell order goes through, the new quoted price will be $95. For high volume stocks, there will usually be so many orders near the midpoint price ($105, in this case) that you won't see any price slippage for small orders.  You can also post limit orders, which are essentially open orders waiting to be filled like in the above example. They ensure you get the price you want, but you have no way to guarantee they'll be filled or not.  Edit: as a cool example, check out the bitcoin GDAX on coinbase for a live example of what the order book looks like for stocks. You'll see that the price of bitcoin will drift towards whichever direction has the less dense order book (e.g. price drifts upwards when there are far more bids than asks.)" Most likely economics then. What I'm looking to gain is an understanding of how the market works so that I may take that knowledge and use it to make investments, buy stocks, or possibly start a business.  I have a very large amount of time between my studies for my classes and I think it would be a waste to not learn these tools (to give you a reason for my interest in this). "Price is decided by what shares are offered at what prices and who blinks first.  The buyer and seller are both trying to find the best offer, for their definition of best, within the constraints then have set on their bid or ask. The seller will sell to the highest bid they can get that they consider acceptable. The buyer will buy from the lowest offer they can get that they consider acceptable. The price -- and whether a sale/purchase happens at all -- depends on what other trades are still available and how long you're willing to wait for one you're happy with, and may be different on one share than another ""at the same time"" if the purchase couldn't be completed with the single best offer and had to buy from multiple offers. This may have been easier to understand in the days of open outcry pit trading, when you could see just how chaotic the process is... but it all boils down to a high-speed version of seeking the best deal in an old-fashioned marketplace where no prices are fixed and every sale requires (or at least offers the opportunity for) negotiation. ""Fred sells it five cents cheaper!"" ""Then why aren't you buying from him?"" ""He's out of stock."" ""Well, when I don't have any, my price is ten cents cheaper."" ""Maybe I won't buy today, or I'll buy elsewhere. ""Maybe I won't sell today. Or maybe someone else will pay my price. Sam looks interested..."" ""Ok, ok. I can offer two cents more."" ""Three. Sam looks really interested."" ""Two and a half, and throw in an apple for Susie."" ""Done."" And the next buyer or seller starts the whole process over again. Open outcry really is just a way of trying to shop around very, very, very fast, and electronic reconciliation speeds it up even more, but it's conceptually the same process -- either seller gets what they're asking, or they adjust and/or the buyer adjusts until they meet, or everyone agrees that there's no agreement and goes home." That is mostly true, in most situations when there are more buy orders than sell orders (higher buy volume orders than sell volume orders), the price will generally move upwards and vice versa, when there are more sell orders than buy orders (higher sell volume orders than buy volume orders), the price will generally move downwards. Note that this does not always happen, but usually it does. You are also correct that for a trade to take place a buyer has to be matched with a seller (or the buy volume matched with the sell volume). But not all orders get executed as trades. Say there are 50 buy orders in the order book with a total volume of 100,000 shares and the highest buy order is currently at $10.00. On the other side there are only 10 sell orders in the order book with total volume of 10,000 shares and the lowest sell order is currently $10.05. At the moment there won't be a trade unless a new buyer or seller enters the market to match the opposing side, or an existing order gets amended upper or lower to match the opposing side. With more demand than supply in the order books what will be the most likely direction that this stock moves in? Most likely the price will move upwards. If a new buyer sees the price moving higher and then looks at the market depth, they would most likely place an order closer to the lowest sell order than the current highest buy order, say $10.01, to be first in line in case a market sell order is placed on the market. As new buy orders enter the market it drives the price higher and higher until the buy orders dry up. I was referring to insider information as a seperate means of profiting. So I assumed:  1. Fundamental analysis/picking the direction 2. Insider information 3. Gaming the market (illiquid markets)  If this is true. What makes a good market maker? Stoploss/takeprofit management and hope there are enough players in it *not* to win it (i.e. hedge positions) to take profit from?  Sounds very luck base or is there something im missing?  Thanks This has never really adequately explained it for me, and I've tried reading up on it all over the place. For a long time I thought that in a trade, the market maker pockets the spread *for that trade*, but that's not the case.  The only sensible explanation I've found (which I'm not going to give in full...) is that the market maker will provide liquidity by buying and selling trades they have no actual view on (short or long), and if the spread is higher, that contributes directly to the amount they make over time when they open and close positions they've made.  It would be great to see a single definitive example somewhere that shows how a market maker makes money. If you place a market order, you are guaranteed to sell your stock unless the stock is in a trading halt. A market order does not guarantee the price you sell the stock at.  If you place a market order, even if the stock is very illiquid a market maker will guarantee a market, but will not guarantee a price. "One occastion where ""will not be quoted ex"" is used is when a corporate action is occurring such as a spin-off.  In such a case, the rights to, and the spin-off itself may be quoted separately on the home country exchange.  However, if the company is based abroad, it may not be worth the expense for them to have an additional securities listing on the local (US) exchange. For example:  In November 2016, Yamana Gold (TSX: YRI, NYSE: AUY) announced it will have an initial public offering of a spin-off (Brio Gold, to be listed on TSX as BRIO).  Existing shareholders received a right to one share of the spin-off for every 16 shares they held of YRI (or AUY).  These rights were separately traded in advance of the IPO of the spin-off on TSX under ""YRI.RT"", but the prospectus they stated that the rights ""will not be quoted ex"" on NYSE, i.e. there was no separate listing on NYSE for these rights. The wording seems counter-intuitive, but I suspect that is the attorneys who were preparing the prospectus used those specific words as they may have a very specific meaning (e.g. from a statute or previous case)." When there is a difference between the two ... no trading occurs. Let's look at an example: Investor A, B, C, and D all buy/sell shares of company X. Investor A wants to sell 10 shares at $20 a share (Ask price $20 x10). Investor B wants to buy 15 shares at $10 a share (Bid price $10 x15). Since the bid price and ask price are different, no sale is made. Next Investor C comes along and wants to sell 5 shares at $14 (Ask price $14 x5). Still no sale. Investor D comes along and wants to buy 5 shares for $14 each. So a sale is finally made. At this point, the stock quote moves to $14. The ask price is $20 x10 and the bid price is $10 x15. No further trading will occur until another investor is willing to buy at $20 or sell at $10.  Another discussion of this topic is shown on this post.