MEMC Electronic Materials Inc., down $2.60 at $73.79
Production issues caused the solar power wafer maker to lower its first-quarter revenue outlook below expectations.
NASDAQ
Garmin Ltd., down $1.55 at $54.86
The personal navigation device maker's chief financial officer forecast a sequential decline in first-quarter revenue.
Research In Motion Ltd., up $7.69 at $123.48
Strong subscriber growth and demand for smart phones more than doubled the BlackBerry maker's quarterly profit.
Plexus Corp., down $3.74 at $25.64
A run-up in the stock price and expected sales weakness caused an analyst to downgrade the contract electronics manufacturer.

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