$ARAY is one of biggest winner #stocks today. read more:

Accuray Incorporated (symbol: ARAY) was one of the biggest winners of the
trading day today (2015-08-21), gaining 12.67%. The number of shares that
changed hands was 5,479,631, or about 5.3 times the average daily volume in
the stock.
The closing price was $6.58, amounting to a market cap of $519,730,000,
about -34.27% off the highest price in the last 12 months. The stock has
been trading at a range between $5.65 and $10.01.
ARAY is in the Medical/Dental Instruments industry, part of the Health Care
sector. It first went public in 2007.