The S&P 500 Index is on track to post total returns more consistently than any other time since the beginning of the internet-driven dotcom bubble in the late 1990s, according to data from Bloomberg.

Total returns, which reflect dividends and change in share price, have been positive for 17 of the last 18 months. The only month with negative total returns was October 2016, as pre-election concerns plagued equities markets.

If the index posts positive total returns for September, its performance would meet that of the months from December 1994 to June 1996, ahead of the dotcom bubble.

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