Rafferty Asset Management LLC trimmed its position in KLA Co. (NASDAQ:KLAC – Free Report) by 1.7% during the fourth quarter, HoldingsChannel.com reports. The firm owned 439,563 shares of the semiconductor company’s stock after selling 7,665 shares during the quarter. KLA accounts for approximately 1.1% of Rafferty Asset Management LLC’s investment portfolio, making the stock its […]