David Einhorn is a well-known investor whose opinions can significantly influence market perceptions and investor behavior. His positive comments on CNBC about NYCB likely led to increased investor confidence in the stock, resulting in a short-term price increase. The relevance is high as the news directly pertains to NYCB, and the importance is significant given Einhorn's influence in the investment community. The confidence level reflects the clear cause-and-effect relationship between Einhorn's comments and the stock's performance.