A self-made millionaire shares 2 mistakes to avoid amid market chaos and the one strategy change he's made

Ramit Sethi is the author of 'Money for Couples' and 'I Will Teach You To Be Rich.'

Menelik Puryear

• Last week featured shocking stock-market volatility in response to Trump's trade war.
• Ramit Sethi advises against panic selling and over-optimizing investments.
• Sethi recommends building a 12-month emergency fund amid market uncertainty.

Global markets have swung wildly due to uncertainty surrounding President Donald Trump's tariffs.

"If anything, the...