Louisiana State Employees Retirement System raised its stake in JetBlue Airways Co. (NASDAQ:JBLU – Get Rating) by 2.0% in the 1st quarter, according to its most recent Form 13F filing with the Securities and Exchange Commission (SEC). The institutional investor owned 83,300 shares of the transportation company’s stock after acquiring an additional 1,600 shares during the period. Louisiana State Employees Retirement System’s holdings in JetBlue Airways were…