Bellafiore pointed to some unusual call buying in DryShips options, which would indicate a bullish sentiment among traders. Shares of DryShips closed Friday's session at $6.74, up 39 cents, or about 5%, on heavier-than-average volume, giving up some of their earlier gains. Star Bulk Carriers ( SBLK) was another leading gainer in the sector, with its stock advancing 16 cents, or 4.6%, to $3.68. Another big mover was OceanFrieght ( OCNF); its shares closed Friday up 13 cents, or 8.7%, at $1.63. Two big dry-bulk names were in the red, however. DryShips rivals Diana Shipping ( DSX) and Genco Shipping & Trading ( GNK) both slipped by about 1.2%, to $13.60 and $21.75, respectively. Elsewhere, the gains were moderate. Navios Maritime Holdings ( NM) rose 1% to $5.05; Eagle Bulk ( EGLE) added 2.8% to $5.45; and Excel Maritime ( EXM) was up by just a penny to $7.21. At the Jeffries conference in New York, which ran all day Wednesday, it was a who's who of high-level executives, including those from Navios, Genco, Diana, Excel, Eagle, DryShips, OceanFreight, Paragon Shipping ( PRGN), Safe Bulkers ( SBLK) and FreeSeas ( FREE). -- Written by Scott Eden in New York Follow TheStreet.com on Twitter and become a fan on Facebook.