Stock exchanges open on Saturday
According to Wikipedia as well as this stock market trading-hours website, the Tehran Stock Exchange is open Saturday through Wednesday.
"You will almost certainly be able to sell 10,000 shares at once. The question is a matter of price. If you sell ""at market"" then you may get a lower price for each ""batch"" of the stock sold (one person buys 50, another buys 200, another buys 1000 etc) at varying prices. Will you be able to execute a single order to sell them all at the same price at the same time? Nobody can say, and it's not really a function of the company size. The exchange has what's called ""open interest"" which roughly correlates to how many people have active orders in at a given price. This number is constantly changing alongside the bid and ask (particularly for active stocks). So let's say you have 10,000 shares and you want to sell them for $100 each. What you need is at least 10,000 in open interest at $100 bid to execute. By contrast let's say you issue a limit order at $100 for 10,000 shares. Your ask will stay outstanding at that price and you'll be filled at that price if there are enough buyers. I you have a limit sell order at $100 for 10,000 shares the strike price of the stock cannot go to $100.01 until all of your sell orders are filled." "The receiving Roth IRA custodian will almost certainly not charge you anything; they are eager to get their hands on the money. In fact, the easiest and most efficient way is to fill out the forms for opening a Roth IRA account with the new custodian (most of this can be done online, but it might be necessary to print out a paper form, sign it and send/fax it to the company), tell them that the Roth IRA will be funded by a trustee-to-trustee transfer from the current custodian, and tell them to go get the money from the online bank who is the current custodian of your Roth IRA account. Don't approach your online bank and tell them to send the money to your new Roth IRA custodian; it will cost money and take more time and the likelihood of a screw-up is way too high. The current custodian might charge you a fee for closing the account, or for ""breaking a CD"" if that savings account is a CD and you are withdrawing the money before the maturity date of the CD. This will be spelled out in the Roth IRA custodial agreement that you accepted when you opened the account (but most likely did not read in full when you received it, and might even have discarded). One final note: with just $11K, please do not open a brokerage account for your Roth IRA and invest in stocks, bonds etc.  For now, invest all your Roth IRA in a single low-cost mutual fund (preferably an index fund such as the Vanguard S&P 500 Index fund or Fidelity Spartan 500 fund); you can branch out into more funds when you have more money in your Roth IRA. Investing in these funds does not need you to have a brokerage account; you can do it directly on the fund's website. Avoid (for now) the siren song of Exchange-Traded Funds (ETFs) because you need to have a brokerage account to buy and sell them.  When you have more money in your Roth IRA account, say in ten years' time, you can start investing in individual stocks, ETFs and the like through a brokerage account, but don't do it now." "Not all call options that have value at expiration, exercise by purchasing the security (or attempting to, with funds in your account).   On ETNs, they often (always?) settle in cash.  As an example of an option I'm currently looking at, AVSPY, it settles in cash (please confirm by reading the documentation on this set of options at http://www.nasdaqomxtrader.com/Micro.aspx?id=Alpha, but it is an example of this).  There's nothing it can settle into (as you can't purchase the AVSPY index, only options on it).  You may quickly look (wikipedia) at the difference between ""American Style"" options and ""European Style"" options, for more understanding here. Interestingly I just spoke to my broker about this subject for a trade execution.  Before I go into that, let me also quickly refer to Joe's answer:  what you buy, you can sell.  That's one of the jobs of a market maker, to provide liquidity in a market.  So, when you buy a stock, you can sell it.  When you buy an option, you can sell it.  That's at any time before expiration (although how close you do it before the closing bell on expiration Friday/Saturday is your discretion).  When a market maker lists an option price, they list a bid and an ask.  If you are willing to sell at the bid price, they need to purchase it (generally speaking).  That's why they put a spread between the bid and ask price, but that's another topic not related to your question -- just note the point of them buying at the bid price, and selling at the ask price -- that's what they're saying they'll do. Now, one major difference with options vs. stocks is that options are contracts. So, therefore, we can note just as easily that YOU can sell the option on something (particularly if you own either the underlying, or an option deeper in the money).  If you own the underlying instrument/stock, and you sell a CALL option on it, this is a strategy typically referred to as a covered call, considered a ""risk reduction"" strategy.  You forfeit (potential) gains on the upside, for money you receive in selling the option. The point of this discussion is, is simply: what one buys one can sell;  what one sells one can buy -- that's how a ""market"" is supposed to work.  And also, not to think that making money in options is buying first, then selling.  It may be selling, and either buying back or ideally that option expiring worthless. -- Now, a final example.  Let's say you buy a deep in the money call on a stock trading at $150, and you own the $100 calls.  At expiration, these have a value of $50.  But let's say, you don't have any money in your account, to take ownership of the underlying security (you have to come up with the additional $100 per share you are missing).  In that case, need to call  your broker and see how they handle it, and it will depend on the type of account you have (e.g. margin or not, IRA, etc).  Generally speaking though, the ""margin department"" makes these decisions, and they look through folks that have options on things that have value, and are expiring, and whether they have the funds in their account to absorb the security they are going to need to own.  Exchange-wise, options that have value at expiration, are exercised.  But what if the person who has the option, doesn't have the funds to own the whole stock? Well, ideally on Monday they'll buy all the shares with the options you have at the current price, and immediately liquidate the amount you can't afford to own, but they don't have to.  I'm mentioning this detail so that it helps you see what's going or needs to go on with exchanges and brokerages and individuals, so you have a broader picture." "I think your best bet here would be HSBC.  They will provide the required currencies, credit/debit cards, and very easy to use online banking transfers.  This includes an online ""Global Account View"" which features all of your accounts on a single screen and allows you to ""drag and drop"" money between accounts. Regarding fees, I suspect you will need to be a ""Premier Account"" holder in order to avoid any fees imposed on transactions such as money transfers and exchanging money between currencies.  In my experience HSBC offers extremely good exchange rates when exchanging ""large"" amounts of money ( greater than $10,000 / GBP 5,000 ).  Exchanging small amounts will carry a larger spread but still much better than most banks offer. In my experience, exchanging GBP 5000 will have a spread of about 0.50-to-0.75 percent, while exchanging more than GBP10,000 will have a spread of as little as 0.10-to-0.20 percent. In order to qualify for a ""Premier Account"", if my memory of HSBC UK serves me correctly, you will need to have at least GBP 50,000 net across all of your HSBC managed accounts, including stockbroking and other investment accounts. In order to open a banking Swiss account, you will need to travel to Switzerland and apply in person.  You cannot open a foreign bank account remotely.  With a foreign investment account, I believe you can open accounts remotely.  For example, I opened an account with Fidelity Switzerland using my Fidelity UK account directly from the UK, however obviously Fidelity does not provide banking services so this is not of interest to you. The simplest thing to do is to visit your local HSBC branch and discuss it with them in person. Other UK banks, such as Barclays, will also provide such services, but in my experience they are not as competitive on fees." "In the US there is only one stock market (ignoring penny stocks) and handfuls of different exchanges behind it.  NYSE and NASDAQ are two different exchanges, but all the products you can buy on one can also be bought on the other; i.e. they are all the same market.  So a US equities broker cannot possibly restrict access to any ""markets"" in the US because there is only one. (Interestingly, it is commonplace for US equity brokers to cheat their customers by using only exchanges where they -- the brokers -- get the best deals, even if it means your order is not executed as quickly or cheaply as possible.  This is called payment for order flow and unfortunately will probably take an Act of Congress to stop.) Some very large brokers will have trading access to popular equity markets in other countries (Toronto Stock Exchange, Mexico Stock Exchange, London Stock Exchange) and can support your trades there.  However, at many brokers or in less popular foreign markets this is usually not the case; to trade in the average foreign country you typically must open an account with a broker in that country." Keep in mind that the exchanges do not hold, buy, or sell the stock - people (or funds) do.  All the exchange does is facilitate the sale of stock from one entity to another. So the shares outstanding (and market cap) for a company are set regardless of how many exchanges the stock is listed on.  The company typically indicates the number of shares outstanding in its financial statements.  I do not know if the exchange itself keeps track of shares outstanding; it may just report whatever the company publishes. So theoretically, if you wanted to buy all of the stock of a company, you could do it all in one exchange, provided that all the existing holders of the stock were willing to sell you their shares.  There are many issues with that, though, which I don't think are germane to your question. As a futures trader, I can tell you that the highs and lows for the ES futures diverge simply because they trade around the clock, from 6PM ET to 5PM ET the next day. The SPX is only open during market hours, as is the SPY, but the SPY also trades in the extended hours sessions for about 3.5 hours before and after the regular hours of 930 AM ET to 4PM ET ET. So bottom line, while they pretty much track each other, the difference in their trading hours results in the highs and lows being different. You seem to think that stock exchanges are much more than they actually are. But it's right there in the name: stock exchange. It's a place where people exchange (i.e. trade) stocks, no more and no less. All it does is enable the trading (and thereby price finding). Supposedly they went into mysterious bankruptcy then what will happen to the listed companies  Absolutely nothing. They may have to use a different exchange if they're planning an IPO or stock buyback, that's all. and to the shareholder's stock who invested in companies that were listed in these markets ?  Absolutley nothing. It still belongs to them. Trades that were in progress at the moment the exchange went down might be problematic, but usually the shutdown would happen in a manner that takes care of it, and ultimately the trade either went through or it didn't (and you still have the money). It might take some time to establish this. Let's suppose I am an investor and I bought stocks from a listed company in NYSE and NYSE went into bankruptcy, even though NYSE is a unique business, meaning it doesn't have to do anything with that firm which I invested in. How would I know the stock price of that firm  Look at a different stock exchange. There are dozens even within the USA, hundreds internationally. and will I lose my purchased stocks ?  Of course not, they will still be listed as yours at your broker. In general, what will happen after that ?  People will use different stock exchanges, and some of them migth get overloaded from the additional volume. Expect some inconveniences but no huge problems.