Hottest Stock on Earth*

*(well... that is, if your universe is the S&P 500!)

No matter... shares of Office Depot are not only No. 1 today (up 20 percent) but No. 1 this week... with an astounding 118 percent gain in 5 days.

What's noteable is that ODP actually posted weak results on Wednesday, but they were pushed aside after rival Staples gave strong guidance... which was enough to rally Office Depot and Office Max too.

Also worth noting:

- ODP's short interest has fallen from 10 percent to about 8 percent in October...

- It's one of the 10 smallest members of the S&P 500, with market cap of $990 million...

- And one of 20 S&P 500 index members with a share price less than $5.