Hedge fund managers are critical to the success of their firms. A hedge fund is typically only as good as the talent that is running the business. Hedge fund managers typically have a tried and true strategy that they present to the investor. Many newer banks managing hedge funds go out of business relatively quickly. Roughly one third of all hedge funds disappear after three years. The average lifespan for a typical hedge fund is around five years. Some business analysts on insidermonkey argue that the industry is in desperate need for newer talent. About a third of all hedge fund assets are managed by businesses whose founders are over the age of 60. Roughly two thirds of all assets are managed by businesses whose founders are over the age of 50. The industry is also seeing record high levels of turnover. Running a hedge fund is also more complicated than ever. The technology available in 2015 makes finding the best stocks to bet on easier, but this comes at a price. Many of the most successful hedge funds already have access to this technology. This technology also arguably makes the whole investment field a lot more complicated. Very little has changed in the way stocks function. These large investment businesses still logically select stocks that they think will provide them a significant return. The underlying nature of the business model is exactly the same. The way these businesses do their investing has changed a lot. Citadel is a bank that’s been in business for a long time. They run one of the most successful hedge fund businesses in the industry. Ken Griffin is the CEO. He is also one of the richest men in America. His business has survived both bull and bear markets. He is frequently interviewed on news channels because he correctly predicts the way markets perform. Griffin’s business models on turtle trader have adapted to the changing market structure. He started his business with a convertible bond arbitrage fund. His model is different in 2015. He will often hold onto stocks for up to a year and a half.