Who owns NASDAQ? Does it collect fees from stock transactions?
"NASDAQ OMX Group owns NASDAQ, a stock exchange. It is a corporation, and is listed on the NASDAQ as NDAQ. It makes money by: source NASDAQ also charges for market data services, found in the NASDAQ ""Datastore"". Other information about the fees charged by NYSE and NASDAQ may be found in the Investopedia article The NYSE And Nasdaq: How They Work."
According to Publication 590, broker's commissions for stock transactions within an IRA cannot be paid in addition to the IRA contribution(s), but they are deductible as part of the contribution, or add to the basis if you are making a nondeductible contribution to a Traditional IRA. (Top of Page 10, and Page 12, column 1, in the 2012 edition of Pub 590). On the other hand, trustees'  administrative fees can be paid from outside the IRA if they are billed separately, and are even deductible as a Miscellaneous Deduction on Schedule A of your income tax return (subject to the 2% of AGI threshold).  A long time ago, when my IRA account balances were much smaller, I used to get a bill from my IRA custodian for a $20 annual administrative fee which I paid separately (but never got to deduct due to the 2% threshold). My custodian also allowed  the option of doing nothing in which case the $20 would be collected from (and thus reduce) the amount of money in my IRA.  Note that this does not apply to the expenses charged by the mutual funds that you might have in your IRA; these expenses are treated the same as brokerage commissions and must be paid from within the IRA. "The OP does not explain ""what we pay for processing the transaction (cost of debiting the customer)"".  Who exactly do you pay?  Someone else, or your own employees/contractors?  I will assume that $0.10 is paid to your own employees. Dr $10cash from money people give you Cr $10 liability to them because it is their money in your accounts. Dr $0.10 cash payment of paycheques or supplier invoices Cr $0.10 income statement Operating Eexpense  Dr 0.20 liability to depositors for fees they pay, resulting in $9.80 remaining liability for their money you still have. Cr 0.20 income statement Fee Revenues" "I'm posting this because I think I can do a better job of explaining and detailing everything from start to stop. :) A ""broker"" is just someone who connect buyers and sellers - a middleman of sorts who is easy to deal with. There are many kinds of brokers; the ones you'll most commonly hear about these days are ""mortgage broker"" (for arranging home loans) and ""stockbroker"". The stockbroker helps you buy and sell stock. The stockbroker has a connection to one or more stock exchanges (e.g. Nasdaq, NYSE) and will submit your orders to them in order to fulfill it. This way Nasdaq and NYSE don't have to be in the business of managing millions of customer accounts (and submitting tax information about those accounts to the government and what-not) - they just manage relationships with brokerages, which is much easier for them. To invest in a stock, you will need to: In this day and age, most brokers that you care about will be easily accessed via the Internet, the applications will be available on the Internet, and the trading interface will be over the Internet. There may also be paper and/or telephone interfaces to the brokerage, but the Internet interface will work better. Be aware that post-IPO social media stock is risky; don't invest any money if you're not prepared for the possibility of losing every penny of it. Also, don't forget that a variety of alternative things exist that you can buy from a broker, such as an S&P 500 index fund or exchange-traded corporate bond fund; these will earn you some reward over time with significantly less risk. If you do not already have similar holdings through a retirement plan, you should consider purchasing some of these sooner or later." If you don't have the time or interest to manage investments, you need a financial advisor.  Generally speaking, you're better served by an advisor who collects an annual fee based on a percentage of your account value. Advisors who are compensated based on transactions have a vested interest to churn your account, which is often not in your best interest. You also need to be wary of advisors who peddle expensive mutual funds with sales loads (aka kick-backs to the advisor) or annuities. Your advisor's compensation structure should be transparent as well. "At the bottom of Yahoo! Finance's S & P 500 quote Quotes are real-time for NASDAQ, NYSE, and NYSE MKT. See also delay   times for other exchanges. All information provided ""as is"" for   informational purposes only, not intended for trading purposes or   advice. Neither Yahoo! nor any of independent providers is liable for   any informational errors, incompleteness, or delays, or for any   actions taken in reliance on information contained herein. By   accessing the Yahoo! site, you agree not to redistribute the   information found therein. Fundamental company data provided by Capital IQ. Historical chart data   and daily updates provided by Commodity Systems, Inc. (CSI).   International historical chart data, daily updates, fund summary, fund   performance, dividend data and Morningstar Index data provided by   Morningstar, Inc. Orderbook quotes are provided by BATS Exchange. US   Financials data provided by Edgar Online and all other Financials   provided by Capital IQ. International historical chart data, daily   updates, fundAnalyst estimates data provided by Thomson Financial   Network. All data povided by Thomson Financial Network is based solely   upon research information provided by third party analysts. Yahoo! has   not reviewed, and in no way endorses the validity of such data. Yahoo!   and ThomsonFN shall not be liable for any actions taken in reliance   thereon. Thus, yes there is a DB being accessed that there is likely an agreement between Yahoo! and the providers." Okay. They're faster than most other computers. They either have a dedicated fiber line or are physically closer.  But anyways, they flood the NYSE with tons of orders to slow it down. So they see another broker's order in the line up and delete the bogus orders. They can then make the purchase faster than the other guy. The other guy now has to pay a higher strike price than he initially thought the bid would be.   So let's say Apple's quote is 1.00  They send one order for apple  One for IBM  One for Yahoo  One for NBC Comcast  They see another guy wants Apple. So they cancel the orders for IBM, Yahoo and NBC Comcast and leave the Apple one to complete. The Apple one goes through and then they automatically resell it to the guy looking to buy Apple at a price of 1.0001  TLDR  They flood a bunch of orders at a bunch of different prices/quantities. They cancel before it goes through unless they see someone else wants it. If that person wants it they don't cancel.  edit: I don't even know if all or any of those stocks are listed on the NYSE. In today's world it doesn't make a difference anymore. However, replace NYSE with any exchange and the stock with any ticker symbol.  edit 2: They could also manipulate cross listing. Listing the same stock on two different exchanges. Those prices are mostly uniform but of course higher volume on one could mean a higher price on one before they stabilize. So if you can move fast you can buy the stock at the lower price and sell it on the exchange with the higher price. "Trump called it ""controls"" rather than owns.  He is firmly remaining as the CEO and is the largest shareholder so that's a moot point.  That is still $85 billion in shares.  If Trump wipes off only 10% in stock price with his constant threats of taxes and breaking up a monopoly, that would cost Bezos $8.5 billion.  If Trump does break up Amazon then Bezos may lose much more.  Trump explained to Fox News, ""This is owned as a toy by Jeff Bezos who controls Amazon. Amazon is getting away with murder tax-wise. He's using the Washington Post for power so that the politicians in Washington don't tax Amazon like they should be taxed,"" Trump said. Trump added that he read somewhere that Bezos was worried Trump would go after him for anti-trust violations." For a company listed on NASDAQ, the numbers are published on NASDAQ's site. The most recent settlement date was 4/30/2013, and you can see that it lists 27.5 million shares as held short.  NASDAQ gets these numbers from FINRA member firms, which are required to submit them to the exchange twice a month: Each FINRA member firm is required to report its “total” short interest positions in all customer and proprietary accounts in NASDAQ-listed securities twice a month. These reports are used to calculate short interest in NASDAQ stocks. FINRA member firms are required to report their short positions as of settlement on (1) the 15th of each month, or the preceding business day if the 15th is not a business day, and (2) as of settlement on the last business day of the month.* The reports must be filed by the second business day after the reporting settlement date. FINRA compiles the short interest data and provides it for publication on the 8th business day after the reporting settlement date.