Do brokers impose higher margin requirements on brokerage accounts that are traded through a limited liability corporation? I especially want to know the answer for Interactive Brokers.
Not in general. For retail accounts no. A retail account will always be treated like that is all the capital available to meet losses. With some institutional accounts on the futures side, a large balance sheet for the LLC will help risk allowance. A personal guarantee which is implied with an account in your name, provides more comfort if you have assets outside the account.
For an account at IB, no.
Unbelievable !!! I hope Trump abolishes the SEC.The SEC. Unfortunately, these are for-profit businesses and market data is a profit center. Nobody likes to pay fees, including me. If you want to see who's really getting hosed, take a look at the fees for nondisplay data. In January 2015, some participants went from paying $500-$1000/month to around $13,000/month.