Updated from 10:58 a.m. EST

Shares of shipping stocks have been


this week, but on Thursday the sector pulled back, led by a decline in DryShips.

Lately, DryShips was down 11.5% to $6.34 after opening at $7.38. Also falling were rivals

Eagle Bulk Shippers

(EGLE) - Get Report

, down 3.5% to $6.94,

Excel Maritime Carriers


, off 6% to $7.50,


(GNK) - Get Report

, lower by 5.8% to $17.63, and

Diana Shipping

(DSX) - Get Report

, down 2.9% to $14.57.

Earlier this week, DryShips


on word that it had restructured an important loan agreement. A week before DryShips announced the restructuring pact with Greece's Piraeus Bank, it warned that it might not be able to pay dividends, obtain more debt or make capital investments.

Despite the rally of recent days, the shipping stocks remain well below their 52-week highs. Investors have turned on the group in recent months as economies around the world worsened and concerns built that trade on the high seas would slow.