Billionaire David Booth helped pioneer index investing. Here's his advice for investors.

Key Points:

• David Booth, co-founder of Dimensional Fund Advisors, urges investors to stay calm and keep investing despite market volatility, emphasizing acceptance of uncertainty rather than trying to outsmart the market.
• Booth's new book, "Stay Calm: Learn to Embrace Uncertainty in Investing and Life," highlights the benefits of passive investing, which offers broad market diversification with low fees, and challenges the notion that active managers can consistently beat the market.
• He stresses that long-term stock market returns average around 9-10% annually, rewarding investors for taking risk and benefiting from human ingenuity and resilience through economic downturns.
• Booth advises young people to start investing early to harness the power of compounding and cautions against exiting the market during downturns, as missing gains can significantly impact long-term wealth.
• Addressing concerns about AI and job security, Booth remains optimistic about long-term progress and innovation, while acknowledging the need for better financial education and support for those struggling to save for retirement.