Are stocks always able to be bought and sold at market price?
In general stock markets are very similar to that, however, you can also put in limit orders to say that you will only buy or sell at a given price. These sit in the market for a specified length of time and will be executed when an order arrives that matches the price (or better). Traders who set limit orders are called liquidity (or price) makers as they provide liquidity (i.e. volume to be traded) to be filled later. If there is no counterparty (i.e. buyer to your seller) in the market, a market maker; a large bank or brokerage who is licensed and regulated to do so, will fill your order at some price. That price is based on how much volume (i.e. trading) there is in that stock on average. This is called average daily volume (ADV) and is calculated over varying periods of time; we use ADV30 which is the 30 day average. You can always sell stocks for whatever price you like privately but a market order does not allow you to set your price (you are a price taker) therefore that kind of order will always fill at a market price. As mentioned above limit orders will not fill until the price is hit but will stay on book as long as they aren't filled, expired or cancelled. "As others have noted, your definition of ""market price"" is a bit loose.  Really whatever price you get becomes the current market price.  What you usually get quoted are the current best bid and ask with the last transaction price.  For stocks that don't trade much, the last transaction price may not be representative of the current market value. Your question included regulation (""standards bureau""), and I don't think the current answers are addressing that.  In the US, the Securities and Exchange Commission (SEC) provides some regulation regarding execution price.  It goes by the designation Regulation NMS, and, very roughly, it says that each transaction has to take the best available price at the time that it is executed.  There are some subtleties, but that's the gist of it. No regulation ensures that there will be a counterparty to any transaction that you want to make.  It could happen, for example, that you have shares of some company that you're never able to sell because no one wants them. (BitCoin is the same in this regard.  There is a currently a market for BitCoin, but there's no regulation that ensures there will be a market for it tomorrow.) Outside of the US, I don't know what regulation, if any, exists." Many of the Bitcoin exchanges mimic stock exchanges, though they're much more rudimentary offering only simple buy/sell/cancel orders.  It's fairly normal for retail stock brokerage accounts to allow other sorts of more complex orders, where once a certain criteria is met, (the price falls below some $ threshold, or has a movement greater than some %) then your order is executed.  The space between the current buy order and the current sell order is the bid/ask spread, it's not really about timing.  Person X will buy at $100, person Y will sell at $102.  If both had a price set at $101, they would just transact.  Both parties think they can do a little bit better than the current offer.  The width of the bid/ask spread is not universal by any means.  The current highest buy order and the current lowest sell order, are both the current price.  The current quoted market price is generally the price of the last transaction, whether it's buy or sell. "For any large company, there's a lot of activity, and if you sell at ""market"" your buy or sell will execute in seconds within a penny or two of the real-time ""market"" price.  I often sell at ""limit"" a few cents above market, and those sell within 20 minutes usually.  For much smaller companies, obviously you are beholden to a buyer also wanting that stock, but those are not on major exchanges.  You never see whose buy order you're selling into, that all happens behind the curtain so to speak." "There needs to be a buyer of the shares you are offering.  There are a lot of feature rich options for buying and selling.  I don't understand them all in depth, but for example on TD Ameritrade here are some of the order types ""Limit"", ""Market"", ""Stop Market"", ""Stop Limit"", ""Trailing Stop %"", ""Trailing Stop $"".  This web page will explain the different order types https://invest.ameritrade.com/cgi-bin/apps/u/PLoad?pagename=tutorial/orderTypes/overview.html Stock with a higher volume will allow your trade to execute faster, since there are more frequent trades than stocks with lower volume. (UPDATE: More specifically, not more frequent trades, but more shares changing hands.) I'm a bit of a noob myself, but that's what I understand."
Stop order is shorter term for stop-loss order.  The point being that is intended as a protective measure.  A buy stop order would be used to limit losses when an investor has sold a stock short.  (Meaning that they have borrowed stock and sold it, in hopes that they can take advantage of a decline in the stock's price by replacing the borrowed stock later at a cheaper price.  The idea is to limit losses due to a rising stock price.)  Meanwhile, a sell stop order would be used to limit losses on a stock that an investor actually owns, by selling it before the price declines further. The important thing to keep in mind about stop orders is that they turn into market orders when the stop price is reached.  This means that they will be filled at the best available price when the order is actually executed.  In fast moving markets, this can be a price that is quite different from the stop price. A limit order allows an investor to ensure that they do not buy/sell a stock at more/less than the specified amount. The thing to keep in mind is that a limit order is not guaranteed to execute. A stop-limit order is a combination of a stop-loss order and limit order, in that it becomes a limit order (instead of a market order) when the stop price is reached. Links to definitions: Stop order Stop-limit order Limit order Market order You can, in theory, have the stock price go up without any trading actually occurring. It depends on how the price is quoted. The stock price is not always quoted as the last price someone paid for it. It can also be quoted as the ask price, which is the price a seller is willing to sell at, and the price youd pay if you bought at market. If I am a seller, I can raise the asking price at any time. And if there are no other sellers, or at least none that are selling lower than me, it would look like the price is going up. Because it is, it now costs more to buy it. But no trading has actually occurred. Using Fundamental and Technical Analysis together is actually a good idea for longer term trading of up to 6 months or longer.  The whole idea behind trading with Technical Analysis is to increase the probabilities of a trade going in the desired direction by using uncorrelated indicators that produce the same signal to buy or sell at the same time. For example, you might use a Moving Average (MA) as a buy signal when the price falls for a few days, hits the MA and then reverses and starts moving back up. If however, you also include a Stochastic Oscillator (SO) to indicate when the stock is oversold (under 20%), and if the price rebounds from the MA average at the same time as the Stochastic is crossing over in the oversold position, then this may be a higher probability trade. If you also only trade stocks that are Fundamentally healthy (as fundamentally good stocks are more likely to go up than fundamentally bad stocks) then this might increase the probabilities again. Then if you only buy when the market as a whole is moving up, then this will increase your chances again. A few weeks ago at a seminar, the presenter totalled the men in the room to be 76 and the women in the room to be 8. He then asked what will most likely be the next person to walk in the room - a man or a woman? The statistics are on the side of a wan walking in next. This is what we try to do with Technical Analysis, increase our chances when we take a trade. Of course a woman could be the next person to walk in the room, just like any trade can go against you, and this is why we use money management and risk management and take a small loss when a trade does go against you. Lets look at an example where you could incorporate FA with TA to increase your chances of profits:  Above is a candlestick chart of Select Harvest (SHV), the green line above the price is the perceived value, the pink line is the 40 day MA, the blue line is the EPS, and the white lines is the Stochastic Oscillator (above 80% being overbought and below 20% is oversold). From Feb 2015 to start of Aug 2015 the stock was uptrending, since then the price reversed and started to downtrend. The stock was determined to be fundamentally good early in 2015 with the perceived value gradually increasing and greater than the share price, and the EPS starting to increase regularly from mid April. Thus, as the stock is seen as fundamentally healthy any price reversal in the vicinity of the MA could be seen as a buy opportunity. In fact there where 2 such opportunities on 31st March and 11th June where price had reversed and rebounded off the MA whist the SO crossed over in or near the oversold area. The price did reverse and then rebounded off the MA again on 9th July, however the SO was not in or near the oversold area on this occasion, so not as high in probability terms. The price still rebounded and went up again, however another momentum indicator (not shown here) shows some bearish divergence in this case - so another reason to possibly keep away at this point in time. A good signal to get out of the trade, that is your stop loss has not already taken you out, is when the price breaks and closes below the MA line. This occurred on 7th August. So if we had bought on the first signal on 31st March for $7.41 and sold when the priced broke through the MA on 7th August for $11.76, we would have made a profit of approx. 59% in just over 4 months. If bought on the second signal on 11th June for $9.98 and again sold on 7th August for $11.76, we would have made about 18% in under 2 months. So the fundamentals, the Price (in relation to MA) and the SO where all lining up to provide two high probability trades. Of course you would need to incorporate you risk management (including stops) in case the price did not continue upwards after you bought. If the market is also moving up on the day of the signal this will further increase your chances.  Unless you day trade, which I would avoid, a good way to enter your trades after a signal is to enter a stop buy order after market close to buy if the price moves above the high of the signal day. That way if the market and the stock open and move lower during the day after the signal you avoid entering the trade altogether. This can be incorporated as part of your risk management and trading rules. After the price broke down through the MA we can see that a downtrend commenced which is still current today (in fact I just took a short trade on this stock yesterday). We can also see that the perceived value, whilst still above the price, has reached a peak and is currently moving downwards and the EPS after being flat for a few months has just moved down for the first time in 10 months. So maybe the fundamentals are starting to waver a bit on this stock. It may be a good stock to continue shorting into the future. So basically you can continue using Fundamental Analysis to select which stocks to buy, place them in a watch-list, and then use Technical Analysis to determine when these stocks are starting to uptrend and use a combination of uncorrelated indicators to produce higher probability signals for when to enter your trades. A mutual fund has several classes of shares that are charged different fees. Some shares are sold through brokers and carry a sales charge (called load) that compensates the broker in lieu of a fee that the broker would charge the client for the service.  Vanguard does not have sales charge on its funds and you don't need to go through a broker to buy its shares; you can buy directly from them.  Admiral shares of Vanguard funds are charged lower annual expenses than regular shares (yes, all mutual funds charge expenses for fund adninistration that reduce the return that you get, and Vanguard has some of the lowest expense ratios) but Admiral shares are available only for large investments, typically $50K or so.  If you have invested in a Vanguard mutual fund, your shares can be set to automatically convert to Admiral shares when the investment reaches the right level. A mutual fund manager can buy and sell stocks to achieve the objectives of the fund, so what stockes you are invested in as a share holder in a mutual fund will typically be unknown to you on a day-to-day basis.  On the other hand, Exchange-traded funds (ETFs) are fixed baskets of stocks, and you can buy shares in the ETF.  These shares are bought and sold through a broker (so you pay a transaction fee each time) but expenses are lower since there is no manager to buy and sell stocks: the basket is fixed. Many ETFs follow specific market indexes (e.g. S&P 500).  Another difference between ETFs and mutual funds is that you can buy and sell ETFs at any time of the day just as if you could if you held stocks. With mutual funds, any buy and sell requests  made during the day are processed at the end of the day and the value of the shares that you buy or sell is determined by the closing price of the stocks held by the mutual fund.  With ETFs, you are getting the intra-day price at the time the buy or sell order is executed by your broker. No, Mark is right, if you place a market order there will always be someone to buy or sell at the market price.  Only if you place a limit order on the price can it not sell or be bought.  Just research on your computer and you will find your answer.  You must be specify about open order or limit order when asking. "No one can claim markets are perfectly efficient. The Grossman-Stiglitz paradox explains one reason why it is impossible for the market to be perfectly effecient, and there are plenty of investors that show it is practically possible to consistently beat the market (e.g. ""The Superinvestors of Graham-and-Doddsville"" or RenTec's Medallion Fund).  However, even if you accept as true that prices behave strangely around round numbers, that isn't a refutation of the efficient market hypothesis. The efficient market hypothesis says that price reflect all available information, so the expected price tomorrow is just the price today (not taking into account the time value of money).  The efficient market hypothesis says nothing about how prices are distributed. Historically, a random walk has been used, but that is neither a consequence of the EMH nor a required assumption.  You could say that prices are more volatile the nearer they are to a round number or new high, but that doesn't necessarily give you an edge in making money off the stock." The stock market exists for two reasons. It lets companies raise money to invest, and it lets company owners cash out and get money instead of part-ownership of a company when they are ready to do so. But to accomplish these goals effectively, it needs many more transactions than just those kinds of transaction, because you have to be able to find a buyer when you need one and to have a market price. So there are also a lot of transactions that are just to try to make short-term profit. But we need those transactions to provide the market liquidity to let the stock market work properly for its actual purposes. "When there is a trade the shares were both bought and sold. In any trade on the secondary market there has to be both a buyer and a seller for the trade to take place. So in ""lasttradesize"" a buyer has bought the shares from a seller."