The S&P 500 finished above 2400 for the first time ever yesterday, crossing a barrier that had proven elusive for months. This wasn't the first time it reached 2400, but it was the first time it had closed there.
The benchmark index first topped 2400 in intraday trading more than two months ago, on March 1, but dropped back below that level before the session ended. In the last few trading days, the index held just below 2400 on a closing basis.
The slow rise is a measure of how calm the stock market has been lately. The S&P 500 rose just 0.48 percent on Monday, its 14th straight session without an absolute move of 0.50 percent or more. That matches a streak last seen in 1995.