I can't get a signal como devo tomar orlistat para emagrecer After Microsoft's July 18 notice that it had taken a $900 million write-off, the company's share price plunged by 11.4% in next-day trading. The stock has not yet recovered: As of 3 p.m. Eastern time today, Microsoft shares were still selling for 8.6% less than they were at the close of trading July 18.