Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.
What: For the second time in less than two weeks, Mattson Technology
So what: Last time around, Mattson's stock plunged on no discernible news. This time, the culprit was a disappointing earnings report with strong sales but a wider net loss than expected.
Now what: Like industry peer FSI International
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