NEW YORK ( TheStreet) -- Today's buy-and-trade earnings previews focus on 10 companies in five sectors including Dow components Cisco Systems ( CSCO) who reports in afterhours trading on Wednesday and Wal-Mart ( WMT) who reports premarket on Thursday. Leading the parade is Macy's ( M) who reports pre-market on Wednesday.The 10 stocks include four stocks from the computer and technology sector, three from the retail-wholesale sector, and one each in these sectors; basic materials, construction and consumer staples. The stock market has been experiencing snap back rallies, and crackles to the downside, but the Fed-induced bubble is not ready to pop. The yield on the 30-year Treasury bond ended last week at 3.853%, which caused the ValuEngine valuation warning to intensify to a new 2013 high with 83.8% of all stocks overvalued. The percent of stocks overvalued by 20% or more now stands at 53%. We now show that all 16 sectors are overvalued, 15 double-digit percentages, with nine overvalued by 21.3% to 28.3%.