Kohls Corp KSS.N added 3.1% after TD Cowen upgraded the department store operator to "outperform" from "market perform". By Shristi Achar A and Sruthi Shankar June 15 (Reuters) - Wall Street was on track to open lower on Thursday as the Federal Reserve signaled that borrowing costs could increase further this year after it skipped raising them in its latest meeting. The Fed left rates unchanged at the 5%-5.25% range on Wednesday, but indicated they could rise by at least half a percentage point this year as inflation remains stubbornly persistent and the U.S. economy stays resilient.