NEW YORK ( TheStreet) -- I have been previewing earnings reports for many companies this earnings season. Then a few days later, I follow up on how these stocks performed in reaction to earnings beats and misses, with an eye on revenue and guidance. The purpose of this coverage is to help buy-and-trade investors capture some of the stock specific volatility both before a company reports earnings, and in reaction to these reports.On Aug. 12 I wrote Cisco and Buy-Rated Retailers Headline Earnings and four of the six companies previewed beat earnings per share estimates. Even so, three traded lower after earnings, two moved sideways and one became a momentum stock. This morning the stock market remains under a ValuEngine valuation warning with 75.1% of all stock overvalued 42.2% by 20% or more, 15 of 16 sectors overvalued, 13 by double-digit percentages, seven by more than 20%. The technicals for the major equity averages are a mixed bag. The weekly chart profiles are negative for Dow Industrials, the S&P 500 and Dow Transports, but the Nasdaq and Russell 2000 still have overbought weekly charts. CSCO) ($24.07 vs. $26.05 on Aug. 9) reported a beat of 2 cents a share in afterhours trading on Aug. 14 earning 49 cents. The stock was sent to the woodshed the next morning and continued to move sideways to down to a low of $24.05 yesterday. Poor guidance and a 5% cut in the workforce, or 4,000 employees, was the catalyst for the stock price decline. Cisco continues to have a hold rating according to www.ValuEngine.com with the stock declining below my quarterly value level, now a pivot at $24.44. My annual value level is $22.76 with this week's risky level at $25.95. DDS) ($78.52 vs. $80.14 on Aug. 9) beat EPS estimates by 14 cents earning 79 cents a share in afterhours trading on Aug. 14. The stock tested my monthly value level at $78.18 on Aug. 14 pre-earnings announcement. Last Thursday the stock popped to $86.90 above my quarterly risky level, now a pivot at $84.22. Buy-and-trade investors could have bought the buy rated stock at $78.18 and sold it the next morning at $84.22 for a gain of 7.7%.