Poloniex BORROWING RATES very very.....very cheap??? How cheap.....in USD?

[Cheddy]

I was looking at the Poloniex loan rates on mostly 2 day loans, and they are something like .0050%.  

If I borrow 1 bitcoin at .0050% a day, what does that cost in USD?  

My math seems too low to be true.  

[Cheddy]

I was actually talking about the loan rates that seem fictionally cheap.

Can I do this?

Borrow money from the lending tab, and then use it in the margin tab to day trade with?

I day trade futures contracts, stocks, and options.  I'm just trying to get this market figured out and my routine structured.