$MU is one of biggest losers #stocks today. read more:

Micron Technology, Inc. (symbol: MU) was one of the worst losers of the
trading day today (2015-10-20), losing -10.8%. The number of shares that
changed hands was 67,554,057, or about 2 times the average daily volume in
the stock.
The closing price was $17.09, amounting to a market cap of $18,120,000,000,
about -53.29% off the highest price in the last 12 months. The stock has
been trading at a range between $13.5 and $36.59.
MU is in the Semiconductors industry, part of the Technology sector.
Looking at its valuation, the stock is now trading at 6.92 times earnings.