13F Filings Citadel disclosed a 19.9% Avianca stake. It’s a rare small cap investment for Ken Griffin’s giant fund. In a 13G filed Friday evening, Citadel Advisors disclosed a 19.9% Avianca Holdings (AVH) stake. Ken Griffin's hedge fund reported that it owns 82,364,111 preferred shares of AVH issued to Citadel in exchange for a $356 million investment in Avianca. To... Read more 13F Filings Here are the managers with the highest Sharpe ratios. They excel at picking stocks with high returns and relatively low volatility. The Sharpe ratio is a popular way to measure the return of an investment compared to the amount of risk taken. Risk is measured as volatility or standard deviation. So, the equity managers with the highest Sharpe ratios in the WhaleWisdom database have demonstrated skill picking stocks... Read more 13F Filings Analyzing Energy stocks’ 13F increases — if there’s a $150 oil “super spike,” these stocks could surge. Due to to years of lagging performance, investors have lar...