Someone please answer quickly

I just tried to short a stock and they didn't let me because they claim once a stock is down 10% you can't short it....anyone ever hear of this???

 

I believe that's a new rule following the flash crash.

 

Thats so odd...I wonder why i didn;t hear of it....does it apply to all stocks?

 

Buy PUTS

 

http://www.sec.gov/answers/shortrestrict.htm

 

Why's that?

 

I tried to short a stock the other day and it said there were none available to borrow. Short interest was only 3.5%. What was that about?

 

Or inverse ETFs.