Since 1945, there have been 27 years when the S&P has achieved gains in both January and February (as it has done in 2017). The stock index then finished up for the year (on a total-return basis) in every one of those years with an average rise of 24%.-MarketWatch, Feb 22, 2017
Standard&Poor's 500® consists of 500 US stocks chosen for market size, liquidity, and industry group representation. It is a market-value weighted index, with each stock's weight in the index proportionate to market value. It is not possible to invest directly in an index. Keep in mind investing involves risk. The value of your investment will fluctuate over time and you may gain or lose money. Past performance is no guarantee of future results.