Tiingo Investing : "Create a Better Investment and Retirement Portfolio" is a series dedicated toward teaching basic and advanced topics, like what is a stock, mutual fund, etf, or bond all the way to portfolio construction and hedge fund strategies. It is a lesson plan dedicated toward making professional level tools and concepts accesible to everybody - including the beginning investor and professional trader. If you are just beginning to learn how to invest with a retirement portfolio or your extra savings, this is the perfect place to start. The creator of this series is Rishi Singh, an individual that started in the sciences, entered web development, then traded on Wall St. successfully at both a bank and a hedge fund. Tiingo.com