Although history doesn't repeat to a "t" on Wall Street, it does have a tendency to rhyme.History can be an amazing teacher on Wall Street for those willing to listen. Although what happened in the past doesn't often repeat to a "t" in the future, things do have a way of rhyming for the stock market.While nothing comes with a guarantee when investing, data from Crestmont Research shows that every rolling 20-year period for the benchmark S&P 500 when back-tested to 1900 has generated a positive total return, ...