Micron Technology (MU) - Get Report, maker of memory chips, closed down 10.5%, leading to a semiconductor slump that helped limit Nasdaq gains. The company's second-quarter results Thursday showed an increase in days of inventory to 120 from 90, leading to speculation that the economic slowdown might hurt the sector more than anticipated. Micron posted a 1-cent loss per share for the quarter, beating expectations and including losses from Micron Electronics (MUEI) , but down from year-ago earnings of 30 cents. Rambus (RMBS) - Get Report closed down 0.6%, while Advanced Micro Devices (AMD) - Get Report finished down 6.2%. Micron Electronics closed down 3.5%.