The investment industry is a wonderland for people who love choice and complexity. But opting instead for a very simple, streamlined portfolio can pay off financially and psychologically. ToucanStudios/E+/Getty Images

Are you suffering from decision fatigue? Do you have better things to do than oversee a complex portfolio and keep up with the latest on Wall Street? Do you just want to do as little as possible when it comes to investing but still have the money you need to meet your goals?

If so, good news: Your exhaustion and disinterest might make you a successful investor if you adopt a portfolio strategy we’ll call KISS (Keep It Simple and Smart).

Beating the market is not the norm

The key to the KISS strategy is to not waste effort trying to select the “best” of anything – stock

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