This Is Why You Must Watch 2,450 in the S&P 500

There's one key level you should be watching in the S&P 500: 2,450.
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There's one key level you should be watching in the S&P 500: 2,450.

That's according to NYSE trader Kenny Polcari of O'Neil Securities. 

"2,450 seems to be the level where we've hit resistance the last time we've tested it," Polcari said.

The broad index currently trades near 2,439.

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