Shares of Aetrium ( ATRM) slumped after the chip supplier warned of a fourth-quarter order slowdown. The company made $1.3 million, or 12 cents a share, for the third quarter ended Sept. 30, reversing the year-ago loss of $1 million, or a dime a share. Revenue rose 149% from a year ago and 6% sequentially to $9.2 million. However, the company said orders from its two largest customers slowed significantly during the quarter and indicated that the weak bookings activity has continued into the fourth quarter. Accordingly, Aetrium expects a decline in sequential revenue. Shares plunged $1.85, or 34%, to $3.56. Luminex ( LMNX) tumbled more than 20% a day after the Austin-based company delivered break-even earnings. The company, which manufactures biological-testing technologies, posted net income of $111,000, or break-even on a per-share basis, in the third quarter, compared to a loss of $657,000, or 2 cents a share, in the same period last year. Revenue was $12.5 million, up from the $10.8 million it posted a year before. Shares were lower by $4.18, or 20.7%, at $16 in recent trading.