Heavy selling activity could be expected in September, and investors should look for more insulated stocks.After experiencing sharp declines in 2022, the capital markets have showcased unparalleled resiliency over the last 20 months or so. Since January 2023, the S&P 500 and Nasdaq Composite have boasted total returns of 48% and 66% respectively (as of the time of this article). While it may be tempting to let the good times roll, savvy investors know that now may be a good time to take some gains off the t ...