The Standard & Poor's 500 index hit an all-time high Oct. 28, beating the previous record set in July, according to CNBC.
The S&P 500 rose 0.6 percent to 3,039.42 points Oct. 28, closing above the 3,027.98 level set July 26.
UnitedHealth has gained 13.7 percent for the month and was among the largest point contributors to the index's new record, according to CNBC. Apple and J.P. Morgan were also among the stocks that boosted the index to an all-time high.
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