Nasdaq vs Nasdaq Trade Reporting Facility
"You can infer some of the answers to your questions from the BATS exchange's market data page and its associated help page.  (I'm pretty sure a page like this exists on each stock exchange's website; BATS just happens to be the one I'm used to looking at.) The Matched Volume section refers to all trades on a given date that took place on ""lit"" exchanges; that is, where a public protected US stock exchange's matching engine helped a buyer and a seller find each other.  Because there are exactly 11 such exchanges in existence, it's easy to show 100% of the matched volume broken down into 11 rows. The FINRA & TRF Volume section refers to all trades on a given date that took place on ""non-lit"" exchanges.  These types of trades include dark pool volume and any other trade that is not required to take place in public but is required to be reported (the R in TRF) to FINRA.  There are three venues via which these trades may be reported to FINRA -- NASDAQ's, NYSE's, and FINRA's own ADF.  They're all operated under the purview of FINRA, so the fact that they're ""located at"" NASDAQ or NYSE is a red herring.  (For example, from the volume data it's clear that the NASDAQ facility does not only handle NASDAQ-listed (Tape C) securities, nor does the NYSE facility only handle NYSE-listed (Tape A) securities or anything like that.) The number of institutions reporting to each of the TRFs is large -- many more than the 11 public exchanges -- so the TRF data is not broken down further.  (Also I think the whole point of the TRFs is to report in secret.)  I don't know enough details to say why the NASDTRF has always handled more reporting volume than the other two facilities.  Of course, since we can't see inside the TRF reporting anyway, it's sort of a moot point."
"I don't understand what the D, to the right of APPLE INC, means. This means the graph below is for the ""D"". There is selection at top and you can change this to Minutes [5,20,60,etc], Day, Week [W], Month [M] I'm not understanding how it can say BATS when in actuality AAPL is listed on the NASDAQ. Do all exchanges have info on every stock even from other exchanges and just give them to end-users at a delayed rate? BATS is an exchange. A stock can be listed on multiple exchange. I am not sure if AAPL is also listed on BATS. However looks like BATS has agreement with major stock exchanges to trade their data and supplies this to trading.com" Listing on NYSE has more associated overhead costs than listing on NASDAQ.  In the case of young technology companies, this makes NASDAQ a more attractive option. Perhaps the most important factor is that NYSE requires that a company has an independent compensation committee and an independent nominating committee while NASDAQ requires only that executive compensation and nominating decisions are made by a majority of independent directors.  No self-respecting, would-be-instant-billionare tech entreprenuer is going to want some independent committee lording it over their pay packet.  Additionally, listing on NYSE requires a company have stated guidance for corporate governance while NASDAQ imposes no such requirement.  Similarly, NYSE requires a company have an internal audit team while NASDAQ imposes no such requirement.   Fees on NYSE are also a bit higher than NASDAQ, but the difference is not significant. A good rundown of the pros/cons: http://www.investopedia.com/ask/answers/062215/what-are-advantages-and-disadvantages-listing-nasdaq-versus-other-stock-exchanges.asp "Just read the book Flash Boys by Michael Lewis.  It describes this process in detail, albeit a bit more dramatically than it has to.  Basically what ""HFTs"" (high frequency traders) do is they set up their line to the exchange so its microseconds faster than everyone else.  Then they test out the market with tiny orders, seeing how fast it's getting filled - if these are getting filled immediately, it probably means there's a big order coming in from an investor.  So the algorithm - and it's all algo-based obviously because no human can remotely hope to catch this - will detect that as soon as there's a spike in volume, it will buy all of the volume at the current price, and sell it back for higher, forcing the big investor to take on higher prices.    Another case is that some HFTs can basically buy the entire trade book from an exchange like Nasdaq.  So every time someone places a market order for 200 shares of a 6.5 stock, the HFT will see it, buy up all the current stock from say 6.5-6.6 and sell it back at 6.7.  Not rocket science if you already get info about the trade coming in, in fact this is basically market making but performed by an ""evil HFT"" instead of a ""trustworthy bank.""    But honestly there are a lot more ways to make money from HFT than front-running, which isn't even possible anymore because exchanges no longer sell their books to HFTs." "This page from simplestockinvesting.com gives details of total returns for the S&P500 for each decade over the last 60 years, including total returns for the entire 60 year period. It is important to understand that, from an investors point of view, the total return includes both the change in index value (capital gain) plus dividends received.  This total then needs to be adjusted for inflation to give the ""total real return"". As noted in the analysis provided, 44% of the total return from the S&P500 over the last 80 years comes from dividends.  For the DowJones30, this site provides a calculator for total returns and inflation adjusted total returns for user selected periods. Finding comparable analysis for the NASDAQ market is more difficult.  The NASDAQ market site provides gross values for total returns over fixed periods, but you will then need to do the arithmetic to calculate the equivalent average annual total returns.  No inflation adjusted values for ""real"" returns are provided, so again you will need to combine inflation data from elsewhere and do the arithmetic." "Yes when I place an order with my broker they send it out to the exchange. - For individual investors, what are some cons and pros of trading on    the exchanges directly versus indirectly via brokers? I may be mistaken(I highly doubt it), but from my understanding you cannot trade directly through an exchange as a retail investor. BATS allows membership but it is only for  Your firm must be a registered broker-dealer, registered with a Self Regulatory Organization (SRO) and connected with a clearing firm. No apple (aapl) is listed on the NASDAQ so trades go through the NASDAQ for aapl. Caterpillar Inc (CAT) is listed on the NYSE so trades go through the NYSE.  The exchange you trade on is dependent on the security, if it is listed on the NYSE then you trade on the NYSE. As a regular investor you will be going through a broker. When looking to purchase a security it is more important to know about the company and less important to know what exchange it is listed on. Since there are rules a company must comply with for it to be listed on certain exchanges, it does make a difference but that is more the case when speaking about a stock listed Over the Counter(OTC) or NYSE. It is not important when asking NYSE or NASDAQ? Selecting a broker is something that's dependent on your needs. You should ask your self, ""whats important to me?"", ""Do I want apps(IE: iPhone, android)?"" ""Do I need fancy trading tools?"". Generally all the brokers you listed will most likely do the trick for you. Some review sites: Brokerage Review  Online Broker Review 2012 Barron's 2012 Online Broker Review" I've looked into Thinkorswim; my father uses it. Although better than eTrade, it wasn't quite what I was looking for. Interactive Brokers is a name I had heard a long time ago but forgotten. Thank you for that, it seems to be just what I need. When you are placing an order with an online broker you should already know what exchange or exchanges that stock trades on. For example if you look up under Yahoo Finance: Notice how News Corp is traded both on the ASX and the Nasdaq. The difference is the shares traded on the ASX have the extension .AX, that is how you know the difference between them. When you are putting orders in with your online broker you will need to select the exchange you wish your order to go to (if your broker allows trading on multiple exchanges). So you should always know which exchange your order goes to. I use and recommend barchart.com. Again you have to register but it's free. Although it's a US system it has a full listing of UK stocks and ETFs under International > London. The big advantage of barchart.com is that you can do advanced technical screening with Stochastics and RS, new highs and lows, moving averages etc. You're not stuck with just fundamentals, which in my opinion belong to a previous era. Even if you don't share that opinion you'd still find barchart.com useful for UK stocks.