On September 4, the Utilities Select Sector SPDR ETF (XLU) had an implied volatility of 12%, which is close to its 15-day average. The SPDR S&P 500’s implied volatility was 9%. The implied volatility represents investors’ anxiety. An increase in volatility is generally related to a fall in stock prices. The implied volatility of Southern Company (SO) and Dominion Energy (D) was ~14%. Duke Energy (DUK) and NextEra Energy (NEE) displayed a volatility close to those levels.