CalAmp ( CAMP) slumped in after-hours trading Thursday as the wireless-products maker fell short of estimates. In the quarter ended Nov. 30, the Oxnard, Calif.-based company earned $896,000, or 4 cents a share, down from $5.4 million, or 23 cents a share, a year ago. Revenue edged down 5% to $61.1 million, which was in line with two analysts' projections, according to Thomson Financial. Net income, however, missed the consensus estimate by 2 cents. Shares were losing 37 cents, or 4.6%, to $7.70.

Calavo Growers ( CVGW) rose after it swung to a fiscal fourth-quarter profit. The California-based farmer posted net income of $1.3 million, or 9 cents a share, on revenue of $76.9 million. That compares with year-ago losses of $517,000, or 4 cents a share, on $62.2 million in sales. Full-year 2006 profits broadened to $5.8 million, or 40 cents a share, up from 2005's $3.3 million, or 24 cents a share. Revenue climbed 6% to $273.9 million. Shares were rising 33 cents, or 2.8%, to $12.

D.R. Horton ( DHI) gained after the homebuilder declared a per-share dividend of 15 cents, up 50% from a year ago. The Fort Worth, Texas, company will pay the dividend on Feb. 9 to holders of record on Jan. 26. Shares were advancing 53 cents, or 2%, to $26.50.

IHS ( IHS) fell on disappointing fiscal fourth-quarter earnings. The Englewood, Colo., business-software company said it earned $13.9 million, or 24 cents a share, including several items, among them a one-off $4.1 million charge related to the retirement of CEO Charles Picasso. A year ago, net income totaled $16.4 million, or 29 cents a share. Fourth-quarter sales rose 18% to $148.1 million, which just missed two analysts' $145.6 million targets. Fiscal 2006 earnings were up 35% to $56.3 million, or 99 cents a share. However, shares were down $1.67, or 4.4%, to $36.62.

Murphy Oil ( MUR) dropped after the Arkansas-based company sliced 15 cents off the top of its fourth-quarter earnings guidance, to a range between 40 cents and 45 cents a share, missing Wall Street projections by at least 20 cents. It also expects a daily average of 92,000 barrels of oil equivalent produced during the quarter, down slightly from the 94,000-barrels-daily forecast issued in October. Shares were falling $1.10, or 2.4%, to $45.15.

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