January Barometer

January Barometer

A theory stating that the performance of the S&P 500 in January predicts its performance for the remainder of the year. That it, if the S&P ends January higher than it began, there will be a rising stock market and vice versa. Investors using the January barometer make investment decisions based on this performance; they buy S&P 500 stocks when performance is strong in January and sell when it is not. The January barometer has had mixed results over the years.