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What is the best way to learn investing techniques?
First, you need to figure out what your objectives for the money are.  Mostly, this boils down to how soon you are going to need the money.  If you are, as you say, very busy and you don't need the money until retirement, I'd suggest putting your money in a single target date fund, such as the BlackRock LifePath fund.  You figure out when you are going to retire, and put your money in that fund.  The fund will then pick a mix of stocks, bonds, and other investments, adjusting the risk for your time horizon. Maybe your objectives are different, and you want to become an trader.  You value being able to say at a BBQ, "oh, I bought AAPL at $20", or "I think small caps are over valued".  I'd suggest you take your $50,000, and structure it so you invest $5,000 a year over 10 years.  Nothing teaches you about investing like making or losing a bit of money in the market.  If you put it all in at once, you risk losing it all - well before you've learned many valuable lessons which only the market can teach you. I'd suggest you study the Efficient-market hypothesis before studying specific markets or strategies.