Quote from Sparohok:
If your broker charges you interest on a short position, get a new broker. Short proceeds are a credit, not a debit. Who charges interest on a credit balance?
If you're lucky, your broker will pay you interest on your short proceeds. Probably not much, though. IB pays some interest on short balances over $100k.
Martin
Too bad!Quote from jbusse:
So, for an account with $1 million in total equity, long positions totaling $1 million, and short positions totaling $1 million (assume the shorts are not hard to borrow), would IB pay a net interest on $900K, with no offsetting interest expenses? That would be my understanding, but someone told me differently (that IB would charge an interest expense on $1 million ($2 million in total long + short positions less $1 million in account equity), and then subsequently credit the account with interest proceeds on the $1 million short. I'm fairly certain that IB would not charge any interest expense but I was hoping someone knew for sure.

Wrong, wrong, wrong.Quote from rcj:
IB pays interest on cash bal > 10000usd. Of course that includes cash from a short sale held overnite.
Quote from Sparohok:
Wrong, wrong, wrong.
This is all on IB's web site, explained in painfully complete detail.
http://www.interactivebrokers.com/en/accounts/fees/interest.php
http://www.interactivebrokers.com/en/accounts/fees/interestMethods.php
IB pays interest on cash balances over $10k <i>excluding</i> short proceeds. Short proceeds earn lower interest rates and they only earn interest on balances over $100k.
There is no broker anywhere that will net your short and long positions for interest purposes. Short balances are always paid interest at lower rates than long balances. In fact, you're lucky to earn any interest at all on short proceeds.
Martin