How does a brokerage firm work?
"Brokerages offer you the convenience of buying and selling financial products. They are usually not exchanges themselves, but they can be. Typically there is an exchange and the broker sends orders to that exchange. The main benefit that brokers offer is a simpler commission structure. Not all brokers have their own liquidity, but brokers can have their own allotment of shares of a stock, for example, that they will sell you when you make an order, so that you get what you want faster. Regarding accounts at the exchanges to track actual ownership and transfer of assets, it is not safe to assume thats how that works. There are a lot of shortcomings in how the actual exchange works, since the settlement time is 1 - 3 business days, depending on the product (so upwards of 5 to 6 actual days). In a fast market, the asset can change hands many many times making the accounting completely incorrect for extended time periods. Better to not worry about that part, but if you'd like to read more about how that is regulated look up ""Failure To Deliver"" regulations on short selling to get a better understanding of market microstructure. It is a very antiquated system." The brokerage executes the transactions you tell them to make on your behalf. Other than acting as your agent for those, and maintaining your account, and charging a fee for the service, they have no involvement -- they do not attempt to predict optimal anything, or hold any assets themselves. "Real target of commisions is providing ""risk shelter"". It is kind of ""insurance"", which is actually last step for external risks to delete all your money. In part it cuts some of risks which you provide, brokers track history of all your actions for you (nobody else does). When brokerage firm fails, all your money is zero. It depends from case to case if whole account goes zero, but I wouldn't count on that."
How easy is it to take out your money? To they offer any trading? Do you have to put more money up on your own to trade with?  This seems pretty sketchy. I am currently working at a prop trading firm and although some sketchy firms require you to make a deposit, most legit ones do not. Not to mention their commissions are incredibly high (I interviewed at another sketchy firm but only charges a couple cents for commission).   &gt;most of the time you get rebates on them  If it is not explicitly stated in the contract of how they decide your rebates than don't expect much. Most of the trading industry is build around taking advantage of people where people's word soon becomes meaningless unless it is in writing. I used to work on the software in the front office (and a bit of the middle office) of a brokerage firm. This page describes the process pretty well. Basically there are three parts: So to your question: how does an order get executed? ETFs work the same since they are effectively shares of a mutual fund's assets. True mutual fund shares work differently since they don't get traded in the market. They get traded at the end of the market as just a bookkeeping exercise. Where are you planning on buying this ETF?  I'm guessing it's directly through Vanguard?  If so, that's likely your first reason - the majority of brokerage accounts charge a commission per trade for ETFs (and equities) but not for mutual funds.   Another reason is that people who work in the financial industry (brokerages, mutual fund companies, etc) have to request permission for every trade before placing an order.  This applies to equities and ETFs but does not apply to mutual funds.  It's common for a request to be denied (if the brokerage has inside information due to other business lines they'll block trading, if a mutual fund company is trading the same security they'll block trading, etc) without an explanation.  This can happen for months.  For these folks it's typically easier to use mutual funds. So, if someone can open an account with Vanguard and doesn't work in the financial industry then I agree with your premise.  The Vanguard Admiral shares have a much lower expense, typically very close to their ETFs. Source:  worked for a brokerage and mutual fund company Your brokerage might be cautious about allowing you to loan your IRA money in a Peer-to-Peer lending deal because it might result in a prohibited transaction (e.g. the other Peer is your son-in-law; for the purposes of IRAs, the spouse of a lineal descendant is treated the same as you, and the transaction will be treated as if you have borrowed money from your IRA). If you want to put the money into a lending club, then there might be issues of how the club is structured, e.g. who makes the decisions as to whom the money is loaned to. Such issues don't arise if you are putting the money into a money-market mutual fund, for example, but with new-fangled institutions such as lending clubs, your brokerage might just being cautious. If you want to open an IRA account directly with a lending club, check if the club offers IRA accounts at all. For this, they will likely need to have a custodian company that will handle all the IRA paperwork. For example, the custodian of IRA accounts in Vanguard mutual funds is not the fund or even Vanguard itself but a separate company named Vanguard Fiduciary Trust Company. I am sure other large firms have similar set-ups. Whether your pet Peer-to-Peer lending club has something similar set up already is something you should look into. This part of the answer applies to an earlier version of the question in which the OP said that he wanted to invest in precious metals. Be careful in what you invest in when you say you want to invest in precious metals; in refusing to buy precious metals for you in your IRA, your brokerage (as your fiduciary) might be refusing to engage in  a prohibited transaction on your behalf. Investments in what are called collectibles are deemed to have been distributed to you by the IRA, and if this is an early distribution, then penalties also apply in addition to the income tax.  Publication 590 says Collectibles. These include:  Exception. Your IRA can invest in one, one-half, one-quarter, or one-tenth ounce U.S. gold coins, or one-ounce silver coins minted by the Treasury Department. It can also invest in certain platinum coins and certain gold, silver, palladium, and platinum bullion. So, make sure that your new IRA custodian does allow you to buy (say) titanium or Krugerrands in your IRA if that is your pleasure. I can't give you a detailed answer because I'm away from the computer where I use kMyMoney, but IIRC to add investments you have to create new transactions on the 'brokerage account' linked to your investment account. "All discount brokers offer a commission structure that is based on the average kind of order that their target audience will make. Different brokers advertise to different target audiences. They could all have a lot lower commissions than they do. The maximum commission price for the order ticket is set at $99 by the industry securities regulators. When discount brokers came along and started offering $2 - $9.99 trades, it was simply because these new companies could be competitive in a place where incumbents were overcharging. The same exists with Robinhood. The market landscape and costs have changed over the last decade with regulation NMS, and other brokerage firms never needed to update drastically because they could continue making a lot on commissions with nobody questioning it. The conclusion being that other brokers can also charge a lot less, despite their other overhead costs. Robinhood, like other brokerage firms (and anyone else trading directly with the exchanges), are paid by the exchanges for adding liquidity. Not only are many trades placed with no commission for the broker, they actually earn money for placing the trade. If Robinhood was doing you any favors, they would be paying you. But nobody questions free commissions so they don't. Robinhood, like other brokerage firms, sells your trading data to the highest bidder. This is called ""payment for order flow"", these subscribers see your order on the internet in route to the exhange, and before your order gets to the exchange, the subscriber sends a different order to the exchange so they either get filled before you do (analogous to front running, but different enough to not be illegal) or they alter the price of the thing you wanted to buy or sell so that you have to get a worse price. These subscribers have faster computers and faster internet access than other market participants, so are able to do this so quickly. They are also burning a lot of venture capital like all startups. You shouldn't place too much faith in the idea they are making [enough] money. They also have plans to earn interest off of balances in a variety of ways and offer more options at a price (like margin accounts)." "First, do you get charged a commission or other fee for reinvesting?   Second, why would capital gains and dividends be grouped together? If the broker charges you for that run away. As Joe explained, it is done as a courtesy. Doesn't this mean if I sell the stock, the profit will be used to buy   that stock right back? No, this is only the capital gains distributions of funds. Lastly, there are two additional checkbox options I was hoping   somebody could explain: ""All equity positions currently held in this   account"" and ""Future equity purchases, transfers, and deposits to this   account"". ""All equity positions"" means your selection will be valid for all the positions you already have. ""Future positions"" means it will only affect future positions, not the ones you already have. For example: FOLLOW-UP: Looking around, some people suggest not doing this for   taxable accounts because it complicates cost basis reporting. Is this   a valid concern? Doesn't the brokerage handle that and send you the   information when you sell the stock? Yes, because you end up with tons of positions and you need to track the cost basis for each. Brokers are required to report cost-basis on 1099-B now, so its less of a problem, but before 2011 you'd have 10's of positions each year (if you have a monthly dividend, for example) each with different cost basis, and you'd usually sell them all at once. Go figure the gain. So the new 1099-B reporting regulations help a little on this, but it only kicks in for everything starting of 2013 IIRC. Fortunately, for some investments (mutual funds, mainly) you may chose averaging, but it has drawbacks as well." The Brokerage firm will purchase shares for the dividend paid in a omnibus account for the security of the issuer and then they will distribute fractional shares among all their clients that chose Div Reinvest.  They will only have to buy 1 extra share to account for the fractional portion of what they allocate.  The structure of the market does not permit trading of fractional shares. There is generally not any impact to the market place for Div Reinvest with the exception of certain securities that pay large dividends that are not liquid. sometimes this occurs in  preferred securities where a large amount of Div reinvestment could create a large market order that has market impact.  Most brokers place market orders for the opening on the day following the payment of the dividend. When you sell the fractional portion same process as full shares are sold into the market and the fractional if traded between you and the brokers omnibus account.  if it creates a full share for the broker (omnibus has .6 shares and you sell him .5 they would likely flip that out to the street with the full share portion of your order. This would not have impact to outstanding shares and all cost are operational and with the broker handling the Div reinvestment service.