What happens if a company you hold short merges with another company?
"I don't have anything definitive, but in general positions in a company are not affected materially by what is called a corporate action. ""Corp Actions"" can really be anything that affects the details of a stock. Common examples are a ticker change, or exchange change, IPO (ie a new ticker), doing a split, or merging with another ticker. All of these events do not change the total value of people's positions. If a stock splits, you might have more shares, but they are worth less per share. A merger is quite similar to a split. The old company's stock is converted two the new companies stock at some ratio (ie 10 shares become 1 share) and then converted 1-to-1 to the new symbol. Shorting a stock that splits is no different. You shorted 10 shares, but after the split those are now 100 shares, when you exit the position you have to deliver back 100 ""new"" shares, though dollar-for-dollar they are the same total value. I don't see why a merger would affect your short position. The only difference is you are now shorting a different company, so when you exit the position you'll have to deliver shares of the new company back to the brokerage where you ""borrowed"" the shares you shorted."
"The ""par value"" is a technicality that you can ignore in this case, and it has nothing directly to do with the merger.  When a company issues stock, it puts a ""par value"" on the shares.  If it later issues more shares, they cannot be issued at less than par value. The rest of the notice seems to be as you said: If you hold until the merger takes effect, they are going to give you $25/share and your shares will be gone.  As always, you can try to sell on the open market before that time instead, although you can bet that not too many people are going to want to give you more than $25/share at this point." I don't have a direct short position. It is a structured product linked to the performance of Tesla. I basically get a fixed coupon payment every quater and as long as Tesla doesn't move up more than 50% in the next half year I get my initial investment back plus the coupons. If it should move up more than 50% I lose that percentage of my initial investment One thing no one else has touched on is the issue of time frame. If I'm looking to hold my shares over the next few years, I don't mind riding out a few short-term bumps, while the short-seller is looking to make a quick profit on some bad news. Sure, I could sell and rebuy, but that's a lot of hassle, not to mention commissions and tax issues. The problem with short would be that even if the stock eventually falls, it might raise a lot in the meantime, and unless you have enough collateral, you may not survive till it happens.  To sell shares short, you first need to borrow them (as naked short is currently prohibited in US, as far as I know). Now, to borrow you need some collateral, which is supposed to be worth more that the asset you are borrowing, and usually substantially more, otherwise the risk for the creditor is too high. Suppose you borrowed 10K worth of shares, and gave 15K collateral (numbers are totally imaginary of course). Suppose the shares rose so that total cost is now 14K. At this moment, you will probably be demanded to either raise more collateral or close the position if you can not, thus generating you a 4K loss. Little use it would be to you if next day it fell to 1K - you already lost your money!  As Keynes once said, Markets can remain irrational longer than you can remain solvent. See also another answer which enumerates other issues with short selling. As noted by @MichaelPryor, options may be a safer way to do it. Or a short ETF like PSQ - lists of those are easy to find online. The point of short-selling as a separate instrument is that you can you do it when you can't sell the underlying asset... usually because you don't actually own any of it and in fact believe that it will go down. Shorting allows you to profit from a falling price. Another (non-speculative) possibility is that you don't have the underlying asset right now (and thus can't sell it) but will get it at a certain point in the future, e.g. because it's bonds that you've used to guarantee a loan... or grain that's still growing on your fields. I've been through two instances where I worked for a public company that was merged (for stock) into another company.  In both cases the options I had were replaced with equivalent options in the merged company with the number of shares and strike price adjusted at the same rate as the actual stock was converted, and the vesting terms remained essentially the same.  In other words, the options before and after were in essence equivalent. "mhoran_psprep has answered the question well about ""shorting"" e.g. making a profit if the stock price goes down. However a CEO can take out insurance (called hedging) against the stock price going down in relation to stocks they already own in some cases.    But is must be disclosed in public filings etc. This may be done for example if most of the CEO’s money is in the stock of the company and they can’t sell for tax reasons.    Normally it would only be done for part of the CEO’s holding." When you short a stock and the stock goes ex-div. you have to pay out an amount equal to the dividend. So in your example, GG would short the stock at $10.00, buy back at $9.00 and be charged $1.00 for the dividend. Net effect $0.00. Is there any precedent for companies trading on their own insider information for the benefit of stockholders?  Said another way, if a company were to enter a new market where they were very confident of their ability to steamroll a public competitor, could they use a wholly-owned special-purpose investment vehicle to short that competitor in order to juice the benefit of that move? "What will happen if the stock price just continues to decline?  Nothing. What would happen if folks just stop trading it? Nothing. What if the company goes private? Then they will have to buy you out based on some agreed upon price, as voted by the board and (potentially) approved by the shareholders. Depending on the corporation charter, the board may not be required to seek the shareholders' approval, but if the price the board agreed upon is unreasonable you can sue and prevent the transaction. How do they decide the fair value of the outstanding stocks? Through a process called ""valuation"", there are accounting firms which specialize in this area of public accounting." Absolutely nothing, and it's not their call to make.  The shareholders will want to cut it into as many parts as they  can sell to recoup some of their lost investment. The judge will demand it even if they suddenly had a moral thought.  This will happen when this (and all those other companies) go under, refocuses priorities, or shuts down departments. There is a strategy called merger-arbitrage where you buy the stock of the acquired company when it sells for less than the final acquisition price. Usually the price will rise to about the acquisition price fairly rapidly after the merge is announced, so you have to move fast. The danger is that the merger gets called off (regulatory reasons, the acquired company board votes no) and you get left holding shares bought at a price higher than the price after the merger collapses. This is kind of an advanced strategy and a tough one to back test since each M&A deal is unique. Day traders see a dip, buy stocks, then sell them 4 mins later when the value climbed to a small peak. What value is created? Is the company better off from that trade? The stocks were already outside of company hands, so the trade doesn't affect them at all. You've just received money from others for no contribution to society. A common scenario is a younger business having a great idea but not enough capital funds to actually get the business going. So, investors buy shares which they can sell later on at a higher value. The investor gets value from the shares increasing over time, but the business also gets value of receiving money to build the business. Thanks for your reply. I’m not familiar with the term “Held-For-Trading Security”. My securities are generally held as collateral against my shorts. To clarify, I am just trying to track the “money in” and “money out” entries in my account for the shorts I write. The transaction is relatively straight forward, except there is a ton of information attached! In simple terms, for the ticker CSR and short contract CSRUQ8, the relevant entries look something like this: There are no entries for expiries. I need to ensure that funds are available for future margin calls and assignments. The sale side using covered calls is as involved. "There are situations where you can be forced to cover a position, particular when ""Reg SHO"" (""regulation sho"") is activated. Reg SHO is intended to make naked short sellers cover their position, it is to prevent abusive failure to delivers, where someone goes short without borrowing someone else's shares. Naked shorting isn't a violation of federal securities laws but it becomes an accounting problem when multiple people have claims to the same underlying assets. (I've seen companies that had 120% of their shares sold short, too funny, FWIW the market was correct as the company was worth nothing.) You can be naked short without knowing it. So there can be times when you will be forced to cover. Other people being forced to cover can result in a short squeeze. A risk. The other downside is that you have to pay interest on your borrowings. You also have to pay the dividends to the owner of the shares, if applicable. In shorter time frames these are negligible, but in longer time frames, such as closer to a year or longer, these really add up. Let alone the costs of the market going in the opposite direction, and the commissions."