What's a general
cutoff where a stock would be
classified as 'hard to borrow' vs 'easy to borrow'? For example, if IB charges 0.25% interest and lists > 10 million shares then I'd say it's easy to borrow, but would you still classify it as easy to borrow if interest rate was say below 2% and borrowable shares were over 1 million or a certain percentage of average daily volume?
The reason I'm asking is to decide which stocks to short in my IB vs AMTD accounts. IB publishes detailed short rate and shares available at
ftp://ftp3.interactivebrokers.com (always charging a fee even if shorting most liquid ETB stocks such as MSFT) while AMTD only qualifies it as ETB (easy to borrow with NO short interest and NO commission) or HTB (hard to borrow with undetermined fee) or NTB (none to borrow) on their Think Or Swim platform.