We have another new leader as TheStreet.com'sBeat the Street contest enters its final day.

"Mardan59" used an all-short portfolio made up mostly of "credit-crisis" plays such as mortgage insurers and banks to take over the top spot.

The portfolio, which totaled $302,696.90 after Thursday trading, consists of

MBIA

(MBI) - Get Report

,

PMI Group

( PMI),

MGIC

(MGIC) - Get Report

,

Washington Mutual

(WM) - Get Report

,

MF Global

( MF) and

UAL

( UAUA).

The contestants are playing for a $5,000 prize. Check back tomorrow evening to see who won.

This article was written by a staff member of TheStreet.com.