NEW YORK ( TheStreet) -- Earnings volatility continued following last Wednesday's quarterly results from the eight companies I profiled pre-earnings last Tuesday. Luxury retailer Ralph Lauren ( RL) was the biggest winner premarket gapping above its 200-day simple moving average, but by the end of the week this stock was back down to its 200-day. After opening higher Chesapeake Energy ( CHK) then fell below its 50-day SMA.On Tuesday I wrote Humana and Molson Coors Earnings on Tap Wednesday and four of the eight stocks profiled had yo-yo reactions to their earnings results. The health care stock in the headline opened lower then snapped higher. The beer maker in the headline did the opposite setting a new multi-year high then cracked below its prior high. There were no upgrades and downgrades among these eight stocks according to www.ValuEngine.com.