Best Buy Co stock gains almost 19% as strong earnings are reported

Best Buy Co., Inc. (BBY) gains almost 19% today and recent trading is at $38.87 per share.The electronics retailer reported better than expected sales and earnings outlook for third quarter, source Yahoo finance.
It would be nice buying the stock at its close yesterday.But earnings are so unpredictable for the stock market.One good alternative for earnings season is the options straddle strategy if there is volatility as today.This stock market investing is not working always and is not suitable for every investor as risk tolerance needs to be evaluated.