monolithic power systems inc mpwr shares fell in the extended session monday after the computer power system maker’s inline forecast took away from its earnings beat monolithic shares fell more than 4 after hours following a 26 rise in the regular session to close at 55949 the company reported secondquarter net income of 995 million or 204 a share compared with 1147 million or 237 a share in the yearago period adjusted earnings which exclude stockbased compensation expenses and other items were 282 a share compared with 325 a share in the yearago period revenue declined to 4411 million from 461 million in the yearago quarter analysts surveyed by factset had forecast 280 a share on revenue of 4404 million monolithic forecast thirdquarter revenue of 464 million to 484 million while analysts had estimated 4734 million