Thursday's Small-Cap Winners & Losers

Small stocks underperformed the rest of the market on Thursday for the second straight session, and helping things along was Smith Micro Software's (SMSI Quote) plunge. Jeffries cut the maker of wireless-communications software to hold from buy, sending shares down $3.02, or 15.3%, to $16.71.

Boots & Coots International Well Control (WEL Quote), a Houston-based company that sells services to the oil and gas industry, offered 26 million shares at $2.10 apiece before underwriting discounts and commissions, half of which are being sold by the company itself. There's a 3.9-million-share underwriter's option in case of overallotment. Shares were losing 30 cents, or 12%, to $2.21.

Maryland's TVI (TVIN Quote), which makes shelter systems and other products, plummeted 21.6% to $1.09 after saying Chief Executive Richard Priddy and Executive VP Charles Sample had both resigned from the company. Wireless-equipment maker KVH Industries (KVHI Quote) slid 9.1% to $8.67 after breaking even in the first quarter. Analysts polled by Thomson Financial were looking for a profit of 4 cents a share; a year ago, the Middletown, R.I., company made 8 cents a share.

On the upside, North Carolina's PokerTek (PTEK Quote) surged 18.8% to $12 on word it will exclusively provide casino operator Harrah's Entertainment (HET Quote) with "live, player-banked, automated poker tables," pursuant to a "multi-year" deal. Harrah's recently lost 6 cents to $85.41.