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

SEI Investments Company (symbol: SEIC) was one of the worst losers of the
trading day today (2016-01-27), losing -12.69%. The number of shares that
changed hands was 3,935,428, or about 6 times the average daily volume in
the stock.
The closing price was $39.29, amounting to a market cap of $6,470,000,000,
about -29.18% off the highest price in the last 12 months. The stock has
been trading at a range between $37.64 and $55.48.
SEIC is in the Investment Bankers/Brokers/Service industry, part of the
Finance sector. It first went public in 1981.
Looking at its valuation, the stock is now trading at 20.36 times earnings.