The S&P 500 closed at another all-time high today, its 21st ...

The S&P 500 closed at another all-time high today, its 21st of the year. Over the last 12 years, the S&P 500 has hit 368 all-time highs, which is more than any 12-year period in history. $S&P 500 Index (.SPX.US)$