Nicolet Bankshares (NYSE: NIC) saw its share price plummet 11% this week, as of noon ET today from last Friday's close, according to S&P Global Market Intelligence. Overall, the major market indexes were all down this week, with the S&P 500 falling 1.7%, the Dow Jones Industrial Average dropping 3.4%, and the Nasdaq Composite sinking 0.7% as of the same time. Green Bay, Wisconsin-based Nicolet Bankshares posted year-end and fourth-quarter earnings on Jan. 17, and the results may partially be the reason for the stock's decline this week.