NEW YORK ( TheStreet) -- The PMI Group ( PMI) was one of several stocks trading near $5 poised to move on above-average Monday after the mortgage insurer posted disappointing first-quarter results.

The PMI Group said its first-quarter loss ballooned to $1.94 a share from $1.41 a share in the year-ago quarter. Analysts had been looking for a smaller quarterly loss of 94 cents a share, according to Thomson Reuters. Revenue was down 36% from a year ago to $156.6 million, below the $172 million consensus. Separately, PMI said it will offer $400 million in common stock and $200 million in convertible senior notes.

Shares of The PMI Group were down 63 cents, or 9.5%, to $6 in the premarket session. The three-month average daily volume for The PMI Group is 7.43 million, according to Yahoo! Finance.

Elsewhere, Thomas Weisel Partners Group ( TWPG) was poised to rally after Stifel Financial ( SF) said it will buy the investment bank for over $300 million, valuing Thomas Weisel shares at $7.60 each.

Thomas Weisel shares closed Friday at $4.36. The 50-day average daily volume for Thomas Weisel is 75,000, according to the Nasdaq.

Digirad Corp. ( DRAD) jumped by 34 cents, or 16.5%, to $2.40 in the premarket session after the company said it has received clearance from the Food and Drug Administration to market and distribute its portable general imaging nuclear medicine camera. The 50-day average daily volume for Digirad is 72,000.

Radcom ( RDCM) should be active during Monday's session after the communications network test and monitoring company swung to a first-quarter profit of a penny a share from a year-ago loss of 30 cents a share. Revenue more than doubled to $4.4 million in the first quarter, Radcom said. The stock closed Friday at $4.85. The 50-day average daily volume for Radcom is 75,000.

-- Written by Robert Holmes in Boston.

Check out all of Monday's high-volume, under-$5 stocks at the Dollar Store. View the Dollar Store portfolio on StockPickr.

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