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Circuit Breakers Noah talks with Jeremy Siegel, Professor of Finance at The Wharton School of the University of Pennsylvania and author of Stocks for the Long Run; They discuss trends in stock market volatility, and how stock market "circuit breakers" work. Circuit breaker rules enforce a halt in trading on the stock markets when there's a large sell-off. Adjusted levels for the circuit breakers went into effect this week. (4:00)

Stocks for the Long Run, by Jeremy Siegel

All Things Considered

Circuit Breakers

Heard on All Things Considered

Circuit Breakers

Audio will be available later today.

Noah talks with Jeremy Siegel, Professor of Finance at The Wharton School of the University of Pennsylvania and author of Stocks for the Long Run; They discuss trends in stock market volatility, and how stock market "circuit breakers" work. Circuit breaker rules enforce a halt in trading on the stock markets when there's a large sell-off. Adjusted levels for the circuit breakers went into effect this week. (4:00)

Stocks for the Long Run, by Jeremy Siegel