Small-cap stocks moved in lockstep with the rest of the market Friday, starting things off with a slide followed by a slight midday recovery on a fairly even mix of positive and negative news from various sectors. Trading volume exploded at Seattle's Cutter & Buck ( CBUK), vaulting shares up 21.9% to $14.18, after the casual-apparel maker agreed to sell itself to Sweden-based New Wave Group for $156.5 million. Likewise for wireless provider Rural Cellular ( RCCC), based in Minnesota, soared some 22% to $17.25 on preliminary results showing improvement in operating income, revenue and customer numbers. Medis Technologies ( MDTL), a medical-equipment maker, said it began shipping its first batch of 24/7 fuel-cell Power Pack products to Microsoft today. Shares recently jumped $2.77, or 15.1%, to $21.06. Another medical-device maker, ArthroCare ( ARTC), gained 4% to $39.30 on a Lazard upgrade to buy from hold, and Nautilus ( NLS) erased some of Thursday's losses (induced by downward guidance) after Matrix Research raised the fitness-equipment maker to hold from strong sell. Shares were up 4% to $14.21. On the other hand, several small-cap names were sliding on negative analyst research. American Technology Research slapped a sell rating on hard-disk maker Komag ( KOMG), citing the fact that its biggest customer, Seagate Technology ( STX), has recently deflated its sales guidance and will probably outsource less of its disk production. Komag shares fell 50 cents, or 1.6%, to $30.70. Seagate was recently off a penny to $21.73.