Re: [OT] Brokerage for the D Language Foundation

[Laeeth Isharc via Digitalmars-d]

See here on the rehypothecation risk of margin accounts.   A 
margin account allows your broker to lend your securities to the 
street.   If your broker should get into trouble,  you are 
potentially in a significantly worse position than if you held a 
non margin account.

https://blog.wealthfront.com/false-comfort-of-sipc-insurance/

It's worth also considering the SIPC ceiling.