Wednesday's Small-Cap Winners & Losers

Small-cap stocks spent Wednesday in the green along with the rest of the market, partly on the power of a couple of upgrades.

Blockbuster (BBI Quote) jumped 8.9% to $4.30 after Citigroup upped its rating to buy from hold. The analyst cited the video-rental outfit's plan to cut prices for online orders vs. in-store rentals, which he said could allow for a price increase on the company's Total Access program. The program allows customers to rent movies online for a monthly fee and return them to a Blockbuster store.

Caraustar Industries (CSAR Quote), a Georgia-based paper-products maker, was upgraded to neutral from reduce at UBS. Shares soared 14.9% to $5.95 in support of both the Russell 2000 and the S&P SmallCap 600, which were surging 1.3% and 1.2%, respectively.

Ditech Networks (DITC Quote), also a component of both indices, climbed 6.4% to $8.18 after the Mountain View, Calif., telecom-equipment maker said it will buy back up to $60 million of its shares.

CytRx(CYTR Quote) rode high after the Los Angeles biotech announced it has been preliminarily added to the Russell 3000 index. Shares bounced 35 cents, or 9.8%, to $3.94.

On the other hand, managed-care provider HealthSpring (HS Quote), plunged 15% to $19.44 after lopping at least 20 cents off its 2007 per-share earnings guidance. The Nashville, Tenn., company now expects $1.20 to $1.35 a share (including 6 cents in special charges), and blames this on higher-than-expected medical costs in the second quarter. On average, analysts polled by Thomson Financial are looking for $1.59 a share.