I don't know either but I sold my losing position at $2.50 to free up some capital. Up 40%+ on no news.
Update: Bloomberg says BDI is expected to rise 17% for 2013. Hard to believe that would be enough to run EGLE up 40+%. Most other shippers are up 10 - 15% for the day. DRYS is up +12%, EXM is up +28%, but most others are up only single digits (NM up only 5%).
I'll keep my eye on the shippers but EGLE has left a bad taste in my mouth (should have bought NM instead at the time I loaded up on EGLE). Lesson learned: stick with quality rather than pricing.