Why do mutual fund trading limitations exist? e.g. 90 day transfer limits?
Mutual funds (that are not exchange-traded funds) often need to sell some  of their securities to get cash when a shareholder redeems some shares. Such transactions incur costs that are paid (proportionally) by all the shareholders in the fund, not just the person requesting redemption, and thus the remaining shareholders get a lower return. (Exchange-traded funds are traded as if they are shares of common stock,  and a shareholder seeking a redemption pays the costs of the redemption). For this reason, many mutual funds do not allow redemptions for some period of time after a purchase, or purchases for some period of time after a redemption. The periods of time are chosen by the fund, and are stated in the prospectus (which everyone has acknowledged has been received before an investment was made).
First, it's not always the case that ETFs have lower expenses than the equivalent mutual funds.  For example, in the Vanguard family of funds the expense ratio for the ETF version is the same as it is for the Admiral share class in the mutual fund version.  With that in mind, the main advantages of a mutual fund over an equivalent ETF are: From a long-term investor's point of view, the main disadvantage of mutual funds relative to ETFs is the minimum account sizes.  Especially if the fund has multiple share classes (i.e., where better classes get lower expense ratios), you might have to have quite a lot of money invested in the fund in order to get the same expense ratio as the ETF.   There are some other differences that matter to more active investors (e.g., intraday trading, options, etc.), but for a passive investor the ones above are the major ones.  Apart from those mutual funds and ETFs are pretty similar.  Personally, I prefer mutual funds because I'm at a point where the fund minimums aren't really an issue, and I don't want to deal with the more fiddly aspects of ETFs. For investors just starting out the lower minimum investment for an ETF is a big win, as long as you can get commission-free trades (which is what I've assumed above.) The main difference between an ETF and a Mutual Fund is Management. An ETF will track a specific index with NO manager input. A Mutual Fund has a manager that is trying to choose securities for its fund based on the mandate of the fund. Liquidity ETFs trade like a stock, so you can buy at 10am and sell at 11 if you wish. Mutual Funds (most) are valued at the end of each business day, so no intraday trading.  Also ETFs are similar to stocks in that you need a buyer/seller for the ETF that you want/have. Whereas a mutual fund's units are sold back to itself. I do not know of many if any liquity issues with an ETF, but you could be stuck holding it if you can not find a buyer (usually the market maker). Mutual Funds can be closed to trading, however it is rare. Tax treatment Both come down to the underlying holdings in the fund or ETF. However, more often in Mutual Funds you could be stuck paying someone else's taxes, not true with an ETF.  For example, you buy an Equity Mutual Fund 5 years ago, you sell the fund yourself today for little to no gain. I buy the fund a month ago and the fund manager sells a bunch of the stocks they bought for it 10 years ago for a hefty gain. I have a tax liability, you do not even though it is possible that neither of us have any gains in our pocket. It can even go one step further and 6 months from now I could be down money on paper and still have a tax liability. Expenses A Mutual Fund has an MER or Management Expense Ratio, you pay it no matter what. If the fund has a positive return of 12.5% in any given year and it has an MER of 2.5%, then you are up 10%. However if the fund loses 7.5% with the same MER, you are down 10%. An ETF has a much smaller management fee (typically 0.10-0.95%) but you will have trading costs associated with any trades. Risks involved in these as well as any investment are many and likely too long to go into here. However in general, if you have a Canadian Stock ETF it will have similar risks to a Canadian Equity Mutual Fund. I hope this helps. You can use Norbet's Gambit to convert between USD and CAD either direction. I have never personally done this, but I am planning to convert some CAD to USD soon, so I can invest in USD index funds without paying the typical 2% conversion fee.  You must be okay with waiting a few days for the trades to settle, and okay with the fact that the exchange rate will almost certainly change before you sell the shares in the opposite currency. The spread on DLR.TO is about 0.01% - 0.02%, and you also have brokerage commissions and fees. If you use a discount broker the commissions and fees can be quite low. EG. To transfer $5000 USD to CAD using Questrade, you would deposit the USD into a Questrade account and then purchase ~500 units of DLR.U.TO , since it is an ETF there is no commission on the purchase. Then you request that they journal the shares over to DLR.TO and you sell them in CAD (will have about a $5 fee in CAD, and lose about $1 on the spread) and withdraw. The whole thing will have cost you $6 CAD, in lieu of ~$100 you would pay if you did a straightforward conversion with a 2% exchange fee. The difference in fees scales up as the amount you transfer increases. Someone has posted the chat log from when they requested their shares be journaled from DLR.TO to DLR.U.TO here. It looks like it was quite straightforward. Of course there is a time-cost, and the nuisance of signing up for an maintaining an account with a broker if you don't have one already. You can do it on non discount-brokers, but it will only be worth it to do it with a larger amount of money, since the commissions are larger. Note: If you have enough room to hold the CAD amount in your TFSA and will still have that much room at the end of the calendar year, I recommend doing the exchange in a TFSA account. The taxes are minimal unless the exchange rate changes drastically while your trades are settling (from capital gains or losses while waiting a few days for the trades to settle), but they are annoying to calculate, if you do it often. Warning if you do it in a TFSA be sure not to over contribute. Every time you deposit counts as a contribution and your withdrawals don't count against the limit until the next calendar year. This is really an extended comment on the last paragraph of @BenMiller's answer. When (the manager of) a mutual fund sells securities that the fund holds for a profit, or receives dividends (stock dividends, bond interest, etc.), the fund has the option of paying taxes on that money (at corporate rates) and distributing the rest to shareholders in the fund, or passing on the entire amount (categorized as dividends, qualified dividends, net short-term capital gains, and net long-term capital gains) to the shareholders who then pay taxes on the money that they receive at their own respective tax rates. (If the net gains are negative, i.e. losses, they are not passed on to the shareholders. See the last paragraph below).  A shareholder doesn't have to reinvest the distribution amount into the mutual fund: the option of receiving the money as cash always exists, as does the option of investing the distribution into a different mutual fund in the same family, e.g. invest the distributions from Vanguard's S&P 500 Index Fund into Vanguard's Total Bond Index Fund (and/or vice versa). This last can be done without needing a brokerage account, but doing it across fund families will require the money to transit through a brokerage account or a personal account. Such cross-transfers can be helpful in reducing the amounts of money being transferred in re-balancing asset allocations as is recommended be done once or twice a year. Those investing in load funds instead of no-load funds should keep in mind that several load funds waive the load for re-investment of distributions but some funds don't: the sales charge for the reinvestment is pure profit for the fund if the fund was purchased directly or passed on to the brokerage if the fund was purchased through a brokerage account. As Ben points out, a shareholder in a mutual fund must pay taxes (in the appropriate categories) on the distributions  from the fund even though no actual cash has been received because the entire distribution has been reinvested. It is worth keeping in mind that when the mutual fund declares a distribution (say $1.22 a share), the Net Asset Value per share drops by the same amount (assuming no change in the prices of the securities that the fund holds) and the new shares issued are at this lower price. That is, there is no change in the value of the investment: if you had $10,000 in the fund the day before the distribution was declared, you still have $10,000 after the distribution is declared but you own more shares in the fund than you had previously. (In actuality, the new shares appear in your account a couple of days later, not immediately when the distribution is declared).  In short, a distribution  from a mutual fund that is re-invested leads to no change in your net assets, but does increase your tax liability. Ditto for a distribution that is taken as cash or re-invested elsewhere. As a final remark, net capital losses inside a mutual fund are not distributed to shareholders but are retained within the fund to be written off against future capital gains. See also this previous answer  or this one. "The larger macro funds, the ones struggling in this environment, need there to be a""normal"" amount of volatility in the market to make money. They need price action to provide buy/sell points, and to help them spot trends. The one way market we have been in for a long time makes this difficult/impossible. And then when we get two days in a row like we just had, it can really fuck them up and will lead them to take positions of at the worst time. And the loses are larger because all the macro funds use leverage, so a dollar loss could really become $3-6.  The index funds are winning right now, no doubt. But they will have thier day off reckoning too, we just don't know how that plays out...yet.  everyone put active mutual funds in the trash two years ago, and they are having the best year they have had in ages. It's all very cyclical. (Sorry for one paragraph, I'm on mobile.)" My bank (USAA) moves money to and from a USAA brokerage account instantly. They also have instant transfers from their money market funds to checking, savings, and brokerage. It takes the 3 days to go to another institution, though. Ethereum trades are not subject to the same rules as securities are. Thats the primary flaw in your assessment. Yes, cryptocurrency is a free trading arena where you can actually take advantage of market inefficiencies yourself 24 hours a day, 7 days a week, at massive profits. The equity securities markets are not like that, and can't be used as a comparison. If you have a preference for flexibility, then it is already clear which markets work better for you. Market makers can make stub quotes, brokers can easily block their retail customers from doing it themselves. Even the dubious market manipulation excuse is reference to a sanction exclusive to the equity markets. The idea that it went through a week earlier probably triggered the compliance review. Yes, a broker can refuse to place your limit order. It's important to understand that, in general, security transactions involve you and a relatively unknown entity with your broker standing in the middle.  When you sell through Schwab, Schwab needs to receive the funds from the other side of the transaction.  If Schwab gave you access to the funds immediately, it would essentially be a loan until the transaction settles after funds and securities change hands.   If Schwab made funds available to you as soon as they were received, it might still be two days until the money is received; because the other side also has three days. Guaranteed one day settlement would have to include receipt of funds from the buyer in one day and Schwab can't control that. You need to remember this transaction likely includes at least one party in addition to you and Schwab.  Here's the SEC page related to the three day settlement period,  About Settling Trades in Three Days:  T+3