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

Intuitive Surgical, Inc. (symbol: ISRG) was one of the biggest winners of
the trading day today (2015-07-22), gaining 8.87%. The number of shares
that changed hands was 1,303,499, or about 4.7 times the average daily
volume in the stock.
The closing price was $549.88, amounting to a market cap of
$20,270,000,000, about -2.65% off the highest price in the last 12 months.
The stock has been trading at a range between $438.5 and $564.86.
ISRG is in the Industrial Specialties industry, part of the Health Care
sector. It first went public in 2000.
Looking at its valuation, the stock is now trading at 43.55 times earnings.