[pjfin123]

> As this says, margin accounts used in a certain way can put you at risk to lose more than your original investment. However, they are sometimes necessary to make investments with little to no additional risk. For example I may own $50,000 worth of XYZ Corp. and want to sell it on a Monday so as to buy $50,000 worth of DEF Corp on that same Monday. I can't do that if I don't have a margin account - settlement is usually T+2 days.

This isn't really leverage. Your brokerage is just extending you temporary credit to paper over the fact that stock trades take two days to settle. You're never net long more than 100% of your investment.