By Mark DeCambreEven as stocks look set to reach new highs in September, the feeling of dread on Wall Street is palpable.Strategists (and the media) have been incessantly droning on about the seasonal trends that place September as one of the worst months of the year for equity benchmarks.Even last year, when stocks were in a nearly ceaseless race to records, the S&P 500 SPX took a September nosedive that saw it wipe out nearly 10% in value at one point before resuming its bullish rally.Ultimately, September 2020 registered a 3.9% decline for the S&P 500, coming after five straight months of sharp gains in the aftermath of the COVID-19 pandemic that brought financial markets, and the general public, to a near standstill.This time around, investors are worried because the markets ar