Small-cap stocks mainly slumped during Monday's trading, mostly lagging behind the downtrending major indices. The Russell 2000 fell 2% to 750.11, and the S&P Small-Cap 600 was down 2.3% to 389.42.

Analog integrated circuits maker Micrel ( MCRL) was among the winners, climbing 11% to $9.17. The San Jose, Calif., company announced it had entered into a multimillion-dollar contract to supply its solar cells to an unidentified solar company.

Meanwhile, shares of Amarin ( AMRN - Get Report) leapt 35% to 40 cents after the London-based neuroscience research company announced completion of comprehensive data analysis for its phase III Huntington's disease program. The Food and Drug Administration indicated that one more phase III trial and confirming evidence from current data might be enough to enable Amarin to submit a new-drug application (NDA).

Indianapolis footwear retailer Finish Line ( FINL) jumped 4% to $3.51 after UBS ( UBS) petitioned a Tennessee court Friday to relieve it from its obligation to finance Finish Line's $1.5 billion merger buyout of fellow shoe seller Genesco ( GCO - Get Report).

On the losing side of the UBS move, Genesco plummeted 21% to $31.08.

Also in retail, New Albany, Ohio-based Tween Brands shares were slipping 13% to $26.84 after reporting third-quarter earnings of $13 million, or 46 cents a share, vs. $19 million, or 58 cents a share, in the year-ago quarter. Comparable-store sales increased 4%. Earnings were in line with estimates, but Tween lowered fourth-quarter earnings guidance to between 98 cents and $1.08 a share, compared with a previous estimate of $1.03 to $1.13, citing expectations for a slower holiday season.

Golar LNG ( GLNG - Get Report), a Hamilton, Bermuda-based natural gas shipping company, lost 11% to $21.51 after the company announced it issued 3.2 million new shares to finance expansion of its carrier fleet.