Activist investor Carl Icahn reports nearly 10% stake in JetBlue Airways, says stock is undervalued

Activist investor Carl Icahn on Monday reported a nearly 10% stake in JetBlue Airways, saying the airline stock is undervalued. Shares of JetBlue spiked more than 15% in extended trading. Icahn amassed the stake in a series of purchases in January and February, according to regulatory filings. He has had and plans to continue discussions with the company "regarding the possibility of board representation," the records said.JetBlue said in a statement, "We are always open to constructive dialogue with our in ...