The S&P 500 hit a fresh all-time high, rising 0.1 percent to close at 2,751.29.
The index is also enjoying its best start to a year since 1987.
The Dow Jones industrial average jumped 102.80 points to 25,385.80 as Boeing reached an all-time high.
The Dow, S&P 500 and Nasdaq closed above 25,000, 2,700 and 7,000, respectively, for the first time last week.
Shares of Under Armour fell 5.4 percent on Tuesday, after Susquehanna downgraded the athletics apparel to "negative" from "neutral," noting the Under Armour brand remains at risk.