3 reasons YOU could be your money’s worst enemy

"It's not personal, Sonny. It's strictly business." Michael Corleone's retort to his brother in "The Godfather" is also good advice for your investments.

Sam Stovall, chief equity strategist at S&P Capital IQ and the son and grandson of money managers, told CNBC on Tuesday that he doesn't let his emotions rule his stock picks.

Read MoreDow theorists not impressed with market rally

"In this day and age of instant information, I can experience both fear and greed at the exact same moment," he said in a "Squawk Box" interview. "So I will frequently use history as virtual valium."

Watch Stovall explain the three reasons why he keeps emotions out of his investment choices and how market history may help ease your mind about when to get in or out of the stock market.

Introducing Morning Squawk: CNBC's before the bell news roundup

Sign up to receive Morning Squawk in your inbox each weekday › Sample

Contact Stocks


    Get the best of CNBC in your inbox

    To learn more about how we use your information,
    please read our Privacy Policy.
    › Learn More