Micron rises after upbeat first-quarter revenue forecast

** Shares of memory chipmaker Micron Technology MU.O rise 4% to $173.31 after the bell

** MU expects Q1 revenue of $12.50 billion, plus or minus $300 million, vs analysts' average estimate of $11.94 billion, according to data compiled by LSEG

** Posts Q4 revenue of $11.32 billion, beating an estimate of $11.22 billion

** Reports adj. EPS of $3.03 for Q4, above estimate of $2.86

** MU has risen over 97% YTD