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

Seres Therapeutics, Inc. (symbol: MCRB) was one of the worst losers of the
trading day today (2016-09-22), losing -5.71%. The number of shares that
changed hands was 930,956, or about 1 times the average daily volume in the
stock.
The closing price was $13.54, amounting to a market cap of $545,310,000,
about -69.58% off the highest price in the last 12 months. The stock has
been trading at a range between $8.05 and $44.51.
MCRB is in the n/a industry, part of the n/a sector.