Memory chip maker Silicon Storage Technology (SSTI) - Get ShotSpotter, Inc. Report was up 15.5% in preopen Island trading after posting first-quarter earnings late Thursday of 6 cents a share, missing Street estimates by 1 cent and down from 11 cents a year ago.

The company said without a write-down of inventory, earnings would have been 9 cents on lowered manufacturing costs. Silicon Storage also expects revenue for the second quarter to increase 5% to 10%.

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