With both of the following methods of borrowing, you can
borrow slowly over time as you use the money to invest, principal repayments are
not necessary, and you can usually get a relatively low interest rate.
With a margin brokerage
account, you must have some money or stocks in a non-registered
account with the brokerage before you can buy stocks on margin.
If there is a crash in the stock markets, you may get a margin call,
and have to either sell stocks or transfer money into the account.
For this reason, it is important to ensure that you have enough margin
available to withstand a sizeable drop in your market value.
This helps to avoid a margin call, which results in selling the stocks
when they are at a low.