Six Flags, iRobot shares rally Wednesday morning earnings reports from Boeing and AT&T and a better-than-expected update from Yahoo late Tuesday will likely spark action in the shares of all three companies.Wednesday earnings reports expected Boeing Co. BA, +2.26% : The aerospace company is projected to post $1.97 a share in the third quarter, according to a consensus survey by FactSet. Dow Chemical Co. DOW, +3.66% : The chemical giant is expected to post third-quarter earnings of 67 cents a share. Boston Scientific Corp. BSX, +3.62% : The medical devices maker is projected to earn 20 cents a share in the third quarter. Biogen Idec Inc. BIIB, +4.93% : The biotech is likely to report third-quarter earnings of $3.45 a share. Xerox Corp. XRX, +4.10% : The company known for its copiers and printers is expected to report third-quarter earnings of 26 cents a share. AT&T Inc. T, +0.99% : The telecommunications company is forecast to report third-quarter earnings of 64 cents a share. http://www.marketwatch.com/