Icahn sells millions of Yahoo shares

I've been thinking about investing in Yahoo for a while now, since they brought on Carol Bartz, but even since her hiring, I still haven't been able to think of a good reason to buy their stock.

Then yesterday it was reported that Carl Icahn sold 12.7 million shares in Yahoo at a huge loss. He paid an average of $25 per share to buy the stock, and sold then for less than $15 each, a 40% loss.

Despite sale and huge loss, he still owns 4.5% of Yahoo stock, and says he remains optimistic about Yahoo's future.

I happened to read about Ms. Bartz many years ago, so Yahoo still has my interest. I think she'll run a more efficient team, but I don't know what she can do to grow revenue.