The S&P 500 is one of the best long-term investments, giving instant diversification across 500 of the largest US companies in one low-cost, tax-efficient fund. The index has returned about 10% a year on average with dividends reinvested, its dividend has grown about 7% a year over five years, and it has rallied back from nearly every crash or downturn, supporting steady dollar-cost averaging. x.comÂ
