What all-time highs tell us about the markets

This year has already seen close to 20 record highs for the S&P 500, says Philip Petursson, Chief Investment Strategist at IG Wealth Management. But can an index get too high? Philip shares data on the 968 all-time highs since 1970, including how long these periods typically last and how, on average, the market has reacted afterwards, including details of gains and losses.