Since the Dow industrials have rallied 11 percent so far this year, while the transports are up only 2.6 percent, the charts seem to indicate that the transports may be primed for a big upturn.
Alcoa, which kicks off the third-quarter earnings season on Tuesday, is often considered a bellwether stock. But do the quarterly results from the Dow 30 component actually set the tone for the markets?
Historically, quadruple witching day in September has been positive for the markets, with the S&P 500 index closing in the black 75 percent of the time.