After Market Price change, how can I get it at that price?
"If the price used to be 2.50 but by the time you get in an order it's 2.80, you're going to have to pay 2.80. You can't say, ""I want to buy it at the price from an hour ago"". If you could, everybody would wait for the price to go up, then buy at the old price and have an instant guaranteed profit. Well, except that when you tried to sell, I suppose the buyer could say, ""I want to pay the lower price from last July"". So no, you always buy or sell at the current price. If you submit an order after the markets close, your broker should buy the stock for you as soon as possible the next morning. There's no strict queue. There are thousands of brokers out there, they don't take turns. So if your broker has 1000 orders and you are number 1000 on his list, while some other broker has 2 orders and number 1 is someone else wanting to buy the same stock, then even if you got your order in first, the other guy will probably get the first buy. LIFO and FIFO refer to any sort of list or queue, but don't really make sense here. When the market opens a broker has a list of orders he received overnight, which he might think of as a queue. He presumably works his way down the list. But whether he follows a strict and simple first-in-first-out, or does biggest orders first, or does buys for stocks he expects to go up today and sells for stocks he expects to go down today first, or what, I don't know. Does anybody on this forum know, are there rules that say brokers have to go through the overnight orders FIFO, or what is the common practice?" 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. You can make a purchase at the after market price by sending an order that gets executed in after market. Often times these are called Extended orders, or EXT. With an EXT limit order it will place the bid on the after market hours order book. If you get filled, then you have the shares.  This is the answer. "The price of the last trade... Is the price of the last trade. It indicates what one particular buyer and seller agreed upon. There is absolutely no requirement that one of them didn't offer too much or demand too little, so this is nearly meaningless as an indication of what anyone else will be willing to offer or demand. An average of trades across a sufficiently large number of transactions might indicate a rough consensus about the value of a stock, but transactions will be clustered around that average and the average itself moves over time. Either you offer to sell or buy at a particular price, wait for that price, and risk the transaction not taking place at all if nobody agrees, or you do a spot transaction and get the best price at that nanosecond (which may not be the best in the next nanosecond). Or you tell the broker what the limits are that you consider acceptable, trading these risks off against each other. Pick the one which comes closest to your intent and ignore the fact that others may be getting a slightly different price. That's just the way the market works. ""If his price is lower, why didn't you buy it there?"" ""He's out of stock."" ""Well, come back when I'm out of stock and I'll be unable to sell it to you for an even better price!"""
Options reflect expectations about the underlying asset, and options are commonly priced using the Black-Scholes model:  N(d1) and N(d2) are probability functions, S is the spot (current) price of the asset, K is the strike price, r is the risk free rate, and T-t represents time to maturity.  Without getting into the mathematics, it suffices to say that higher volatility or expectation of volatility increases the perceived riskiness of the asset, so call options are priced lower  and put options are priced higher. Think about it intuitively. If the stock is more likely to go downwards, then there's an increased chance that the call option expires worthless, so call options must be priced lower to accommodate the relative change in expected value of the option.  Puts are priced similarly, but they move inversely with respect to call option prices due to Put-Call parity. So if call option prices are falling, then put option prices are rising (Note, however, that call prices falling does not cause put prices to rise. The inverse relationship exists because of changes in the underlying factors and how pricing works.) So the option action signifies that the market believes the stock is headed lower (in the given time frame). That does not mean it will go lower, and option traders assume risk whenever they take a particular position. Bottom line: gotta do your own homework! Best of luck. "Aganju has mentioned put options, which are one good possibility. I would suggest considering an even easier strategy: short selling.  Technically you are borrowing the stock from someone and selling it.  At some point you repurchase the stock to return to the lender (""covering your short"").  If the stock price has fallen, then when you repurchase it, it will be cheaper and you keep the profit. Short selling sounds complicated but it's actually very easy--your broker takes care of all the details.  Just go to your brokerage and click ""sell"" or ""sell short.""  You can use a market or limit order just like you were selling something you own.  When it sells, you are done.  The money gets credited to your account.  At some point (after the price falls) you should repurchase it so you don't have a negative position any more, but your brokerage isn't going to hassle you for this unless you bought a lot and the stock price starts rising.  There will be limits on how much you can short, depending on how much money is in your account.  Some stocks (distressed and small stocks) may sometimes be hard to short, meaning your broker will charge you a kind of interest and/or may not be able to complete your transaction. You will need a margin account (a type of brokerage account) to either use options or short sell.  They are easy to come by, though. Note that for a given amount of starting money in your account, puts can give you a much more dramatic gain if the stock price falls.  But they can (and often do) expire worthless, causing you to lose all money you have spent on them.  If you want to maximize how much you make, use puts.  Otherwise I'd short sell. About IPOs, it depends on what you mean.  If the IPO has just completed and you want to bet that the share price will fall, either puts or short selling will work.  Before an IPO you can't short sell and I doubt you would be able to buy an option either. Foreign stocks?  Depends on whether there is an ADR for them that trades on the domestic market and on the details of your brokerage account.  Let me put it this way, if you can buy it, you can short sell it." "There are no ""rules"" about how the price should act after an IPO, so there are no guarantee that a ""pop"" would appear at the opening day. But when an IPO is done, it's typically underpriced. On average, the shares are 10% up at the end of the first day after the IPO (I don't have the source that, I just remember that from some finance course). Also, after the IPO, the underwriter can be asked to support the trading of the share for a certain period of time. That is the so called stabilizing agent. They have few obligations like: This price support in often done by a repurchase of some of the shares of poorly performing IPO. EDIT: Informations about the overallotment pool. When the IPO is done, a certain number of client buy the shares issued by the company. The underwriter, with the clients, can decide to create an overallotment pool, where the clients would get a little more shares (hence ""overallotment""), but this time the shares are not issued by the company but by the underwriter. To put it another way, the underwriter oversell and becomes short by a certain number of shares (limited to 15% of the IPO). In exchange for the risk taken by this overallotment, the underwriter gets a greenshoe option from the clients, that will allows the underwriter to buy back the oversold shares, at the price of the IPO, from the clients. The idea behind this option is to avoid a market exposure for the underwriter. So, after the IPO: If the price goes down, the underwriter buys back on the market the overshorted shares and makes a profits. If the price goes up, the company exercise the greenshoe option buy the shares at the IPO prices (throught the overallotment pool, that is, the additional shares that the clients wanted ) to avoid suffering a loss." When I ran a gas station, our price was largely set by our neighbors-- the other gas stations in the area. We couldn't go below the current cost of replacement gas, but other than that we wanted to be at .05 over the average. (We got away with charging more because we were the last station on a major road.) Everybody else did the same thing. Also, we only set prices once a day, early in the morning before the commuter rush. Changing prices while somebody is pumping gas Was Not Done, for fairly obvious reasons. So, you'd get these ripples of price-changing, as one station changed its price, and then all its neighbors would react to that the next day, and then THEIR neighbors would change the day after that, and so on. When a stock is ask for 15.2 and bid for 14.5, and the last market price was 14.5, what does it mean? It means that the seller wants to sell for a higher price than the last sale while the buyer does not want to buy for more than the last sale price. Or what if the last price is 15.2? The seller is offering to sell for the last sale price, but the buyer wants to buy for less. Yes, the ADR will trade on a separate exchange from the underlying one, and can (and does) see fluctuations in price that do not match the (exchange corrected) fluctuations that occur in the original market. You are probably exposing yourself to additional risk that is related to: "I'm not sure what you expect in terms of answers, but it depends on personal factors. It pretty well has to depend on personal factors, since otherwise everyone would want to do the same thing (either everyone thinks the current price is one to sell at, or everyone thinks it's one to buy at), and there would be no trades. You wouldn't be able to do what you want, except on the liquidity provided by market makers. Once that's hit, the price is shifting quickly, so your calculation will change quickly too. Purely in terms of maximising expected value taking into account the time value of money, it's all about the same. The market ""should"" already know everything you know, which means that one time to sell is as good as any other. The current price is generally below the expected acquisition price because there's a chance the deal will fall through and the stock price will plummet. That's not to say there aren't clever ""sure-fire"" trading strategies around acquisitions, but they're certain to be based on more than just timing when to sell an existing holding of stock. If you have information that the market doesn't (and assuming it is legal to do so) then you trade based on that information. If you know something the market doesn't that's going to be good for price, hold. If you know something that will reduce the price, sell now. And ""know"" can be used in a loose sense, if you have a strong opinion against the market then you might like to invest based on that. Nothing beats being paid for being right. Finally, bear in mind that expected return is not the same as utility. You have your own investment goals and your own view of risk. If you're more risk-averse than the market then you might prefer to sell now rather than wait for the acquisition. If you're more risk-prone than the market then you might prefer a 90% chance of $1 to 90c. That's fine, hold the stock. The extreme case of this is that you might have a fixed sum at which you will definitely sell up, put everything into the most secure investments you can find, and retire to the Caribbean. If that's the case then you become totally risk-averse the instant your holding crosses that line. Sell and order cocktails." The same as when you are buying a car. If a dealer quotes 10k and you quote 8k. 8k is the buy price and 10k is the sell price.  Somebody might quote 8.5k and another dealer might quote 9.5k. The the new price that you see on your screen is 8.5k(Best buy price) and 9.5k(Best sell price). When the buyer and seller agree to an amount, the car(In your case stock) is traded.