What is the “Short sale circuit breaker rule”?
"Summary: The phrase ""short sale circuit breaker"" rule normally refers to the SEC's recent adoption of a new version of the uptick rule. The new uptick rule triggers a ban on short selling when the stock drops a certain amount. The SEC defines the process like this: The ""circuit breaker"" is triggered for a security any day the price declines by 10% or more from the prior day's closing price The alternative uptick rule, which permits short selling only ""if the price of the security is above the current national best bid.""1 The rule applies ""to short sale orders in that security for the remainder of the day as well as the following day."" In general, the rule applies to all equities. 1) The national best bid is usually the bid price that you see in Level 1 data.   Example: If a stock closed at $100/share on Monday, the ""circuit breaker"" would be triggered if the stock traded at or below $90/share during Tuesday's session. Short-selling would be disallowed until the start of trading on Thursday unless the short-sell price is above the national best bid, i.e. on an uptick. Purpose: The stated purpose of this rule is promote market stability and preserve investor confidence by restricting potentially abusive short selling from driving prices farther downward during periods of increased volatility and downward price pressure. Whether or not such rules succeed is a matter of some debate, and the SEC removed similar uptick rules in 2006 because ""they modestly reduce liquidity and do not appear necessary to prevent manipulation."" Exceptions: There are a few exceptions to the uptick rule that mainly revolve around when the short sell order was placed or when the securities will be delivered."
quantycuenta is right, if a halt is in place, then no trading will occur, simple as that. But in the practice of risk management it is a little different. Want to remind you that you are assuming that trading is halted immediately upon the drop in price. That doesn't always happen, so if there is any time between the actual price drop and halt of trading, then it is possible that your order will be filled, depending on how liquid your security is. Also not every security has circuit breakers in place and the exact requirements to trigger a breaker is not public information.  In some cases, trades are ordered to be rolled back (reversed) by the exchange but this is usually reserved for institutional traders who make some sort of mistake.  This article below mentions day traders who bought at or near the bottom of the May 6, 2010 flash crash. This was before circuit breakers but I think it's a good story for someone looking to understand the finer workings of the electronic market.  http://www.marketwatch.com/story/book-takes-a-look-inside-professional-day-traders-1339513989350 In India, as suggested above, short/long position can be taken either in F&O or Spot market. The F&O segment short/long can be kept open for appx. 3 months by taking position on the far contract. In intra-day/Spot market, usually the position has to be squared at the end of day or the broker will square it during expiry (forcibly). However, having said that, it is a broker specific feature, as per National Stock Exchange (NSE) or Bombay Stock Exchange (BSE) any transaction has to be settled at the end of T+2 days (T being the trade day). Some brokers allow intra-day positions to be open for T+1 or T+2 days as long as the margin is provided. This is a broker specific discretion as the actual settlement is on T+2 (or in some cases as the exchange specifies). So, in general, to short a stock for a longer time, F&O segment should be used. It's actually quite simple. You're actually confusing two concept. Which are taking a short position and short selling itself. Basically when taking a short position is by believing that the stock is going to drop and you sell it. You can or not buy it back later depending on the believe it grows again or not. So basically you didn't make any profit with the drop in the price's value but you didn't lose money either.  Ok but what if you believe the market or specific company is going to drop and you want to profit on it while it's dropping. You can't do this by buying stock because you would be going long right? So back to the basics. To obtain any type of profit I need to buy low and sell high, right? This is natural for use in long positions. Well, now knowing that you can sell high at the current moment and buy low in the future what do you do? You can't sell what you don't have. So acquire it. Ask someone to lend it to you for some time and sell it. So selling high, check.  Now buying low? You promised the person you would return him his stock, as it's intangible he won't even notice it's a different unit, so you buy low and return the lender his stock. Thus you bought low and sold high, meaning having a profit. So technically short selling is a type of short position. If you have multiple portfolios and lend yourself (i.e. maintaining a long-term long position while making some money with a short term short-term strategy) you're actually short selling with your own stock. This happens often in hedge funds where multiple strategies are used and to optimise the transaction costs and borrowing fees, they have algorithms that clear (match) long and short coming in from different traders, algorithms, etc. Keep in mind that you while have a opportunities risk associated.  So basically, yes, you need to always 'borrow' a product to be able to short sell it. What can happen is that you lend yourself but this only makes sense if: "If we take only the title of the question ""can the CEO short the stock"": It was probably different before Enron, but nowadays a CEO can only make planned trades, that is trades that are registered a very long time before, and that cannot be avoided once registered. So the CEO can say ""I sell 100,000 shares in exactly six months time"". Then in six months time, the CEO can and must sell the shares. Anything else will get him into trouble with the SEC quite automatically. I don't know if shorting a stock or buying options can be done that way at all. So it's possible only in the sense of ""it's possible, but you'll be in deep trouble"".  Selling shares or exercising share options may indicate that the company's business is in trouble. If the sale makes that impression and everyone else starts selling because the CEO sold his shares, then the CEO may be in trouble with the board of directors. Such a sale would be totally legal (if announced long time ahead), but just a bad move if it makes the company look bad. Shorting sales is much worse in that respect. If the CEO wants to buy a new car, he may have to sell some shares (there are people paid almost only in share options), no matter where the share price is going. But shorting shares means that you most definitely think the share price is going to drop. You're betting your money on it. That would tend to get a CEO fired, even if it was legal." I think George's answer explains fairly well why the brokerages don't allow this - it's not an exchange rule, it's just that the brokerage has to have the shares to lend, and normally those shares come from people's margin, which is impossible on a non-marginable stock. To address the question of what the alternatives are, on popular stocks like SIRI, a deep In-The-Money put is a fairly accurate emulation of an actual short interest.  If you look at the options on SIRI you will see that a $3 (or higher) put has a delta of -$1, which is the same delta as an actual short share. You also don't have to worry about problems like margin calls when buying options.  The only thing you have to worry about is the expiration date, which isn't generally a major issue if you're buying in-the-money options... unless you're very wrong about the direction of the stock, in which case you could lose everything, but that's always a risk with penny stocks no matter how you trade them. At least with a put option, the maximum amount you can lose is whatever you spent on the contract.  With a short sale, a bull rush on the stock could potentially wipe out your entire margin.  That's why, when betting on downward motion in a microcap or penny stock, I actually prefer to use options.  Just be aware that option contracts can generally only move in increments of $0.05, and that your brokerage will probably impose a bid-ask spread of up to $0.10, so the share price has to move down at least 10 cents (or 10% on a roughly $1 stock like SIRI) for you to just break even; definitely don't attempt to use this as a day-trading tool and go for longer expirations if you can. It seems also on some international markets this is allowed. http://www.businessinsider.com/li-hejun-shorting-hanergy-2015-5 Any publicly traded financial instrument can be sold short, in theory.  There are, however, many regulations associated with short sales of US equities that may prevent certain stocks from being sold short at certain times or through certain brokers. Some examples: the most basic requirement (this isn't a regulation, it's just the definition of a short sale) is that you or your broker must have access to someone willing to loan you his/her shares.  If you are interested in shorting a security with few shares outstanding or low trade volume, there may simply not be enough people in the world willing to loan you theirs.  Alternatively, there may be a shareholder willing to loan shares, but your broker may not have a relationship with the clearing house that shareholder is using.  A larger/better/different broker might be able to help. threshold securities list - since 2005, each day certain securities are not allowed to be sold short based on their recent history of liquidity.  Basically, if a certain number of transactions in a security have not been correctly settled over the past few days, then the SEC has reason to believe that short sales (which require extra transactions) are at higher risk of falling through. circuit breaker a.k.a. alternative uptick - since 2011, during certain market conditions, exchanges are now required to reject short sales for certain securities in order to prevent market crashes/market abuse. In finance, short selling (also known as shorting or going short) is the practice of selling assets, usually securities, that have been borrowed from a third party (usually a broker) with the intention of buying identical assets back at a later date to return to the lender. Remember your broker has to borrow it from somewhere, other clients or if they hold those specific stocks themselves. So if it isn't possible for them to lend you those stocks, they wouldn't. High P/E stocks would find more sellers than buyers, and if the broker has to deliver them, it would be a nightmare for him to deliver all those stocks, which he had lent you(others) back to whom he had borrowed from, as well as to people who had gone long(buy) when you went short(sell). And if every body is selling there is going to be a dearth of stocks to be borrowed from as everybody around is selling instead of buying. I would suggest following your quote and having a read of the web page supplied, that buys then sells or sells short then buys (the same security on the same day) four or more times in five business days, ... So it is a two way transaction that counts as 'one'. When you set up a short sale for equities you are borrowing stock from someone else; typically another client at the broker.  The broker usually buries an agreement to let your shares be borrowed for short sales in your account details.  So if Client A wants to short a stock, he borrows stock from Client B to do the short sale (it's usually not this direct as they can borrow from many clients).  If Client B then wants to sell his shares; if the broker can't shift around assets to find another client's shares to let Client A borrow; then he has to close the short position out because he doesn't have the shares in the brokerage to let Client A borrow to short anymore. Timothy Sykes specializes in this type of trade, according to his website. He has some recommendations for brokers that allow shorting low-priced stocks: Looks like there are no specific rule in India to prevent Wash sales. See the link below.  http://economictimes.indiatimes.com/wealth/personal-finance-news/investors-can-rejig-portfolio-book-short-term-loss-to-save-tax/articleshow/7812788.cms?intenttarget=no hmmm. I think it's because in both cases, you must pay for it up front, before the positions are closed out. You own nothing except the right to buy the stock re: the call, and the obligation to buy the stock re: the short.  You buy a call, but must borrow the stock, for which you must put some margin collateral and there is a cost to borrow. You pay for that, of course.  I wouldn't call it lending though. "Market makers, traders, and value investors would be who I'd suspect for buying the stock that is declining. Some companies stocks can come down considerably which could make some speculators buy the stock at the lower price thinking it may bounce back soon. ""Short sellers"" are out to sell borrowed stocks that if the stock is in free fall, unless the person that shorted wants to close the position, they would let it ride. Worthless stocks are a bit of a special case and quite different than the crash of 1929 where various blue chip stocks like those of the Dow Jones Industrials had severe declines. Thus, the companies going down would be like Apple, Coca-Cola and other large companies that people would be shocked to see come down so much yet there are some examples in recent history if one remembers Enron or Worldcom. Stocks getting delisted tend to cause some selling and there are some speculators may buy the stock believing that the shares may be worth something only to lose the money possibly as one could look at the bankrupt cases of airlines and car companies to study some recent cases here. Circuit breakers are worth noting as these are cases when trading may be halted because of a big swing in prices that it is believed stopping the market may cause things to settle down." Seems like it's more dependent on who you want to be your supplier.  The times I've been involved in requesting this, each company had its own application form.  They usually need proof of business activity, which gets back to SpecKK's answer.