“With interactive brokers you get a notification after the name of the company that those shares have been lent and until when.”
I can see them doing that if you’re signed up for “fully paid lending” but if you’re not signed up they might loan them out and not ever inform you while they take all the interest. With Ameritrade I don’t have a clue what they have lent out even though I’m signed up for FPL. E*trade sends me notifications daily. I don’t know how IB does it but its got to be better than Ameritrade.
Market Data 
Markets 
