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

OvaScience Inc. (symbol: OVAS) was one of the worst losers of the trading
day today (2015-08-28), losing -6.97%. The number of shares that changed
hands was 668,435, or about 1 times the average daily volume in the stock.
The closing price was $19.89, amounting to a market cap of $542,320,000,
about -64.28% off the highest price in the last 12 months. The stock has
been trading at a range between $12.15 and $55.69.
OVAS is in the Major Pharmaceuticals industry, part of the Health Care
sector.