The Richest Man in Babylon In good times and bad, consistently saving a percentage of your income is a sound financial practice. Related Content Your Shifting Risk Tolerance Time and market performance may subtly and slowly imbalance your portfolio. The Anatomy of an Index The S&P 500 represents a large portion of the value of the U.S. equity market, it may be worth understanding. Rebalancing Your Portfolio Over time, different investments' performances can shift a portfolio’s intent and risk profile. Rebalancing may be critical.