Earnings Guidance and Market Uncertainty

We study the effect of disclosure on uncertainty by examining how management earnings forecasts affect stock market volatility. Using implied volatilities from exchange-traded options prices, we find that management earnings forecasts, on average, increase short-term volatility. This effect is attributable to forecasts that convey bad news, especially when firms release forecasts sporadically (as opposed to on a routine basis). In the longer run, market uncertainty declines after earnings are announced regardless of whether there is a preceding earnings forecast. This decline is mitigated when the firm issues a forecast that conveys negative news