Traders work on the floor at the New York Stock Exchange.
Brendan McDermid | Reuters
The S&P 500 is up more than 20% this year, and if history is any gauge, this is bullish for stocks through year-end. A run of this magnitude also bodes well for 2020.
When the S&P 500 is up 20% or more through October, as it is now, the average return through the rest of the year is more than 6%, according to Canaccord Genuity, which tracked market returns back to the 1950s. This has happened seven times in that period. The median return was 5.92% and all seven times led to gains the rest of the year.
Stocks are hitting record highs recently with the Dow Jones Industrial Average reaching an all-time record…