Stock markets have rocketed higher since the election of U.S. president Donald Trump, despite fears emerging that Trump is feeding an asset price bubble. The S&P 500, the Dow Jones industrial average and the tech-heavy Nasdaq have all notched record highs since November,

The S&P 500 flirts with a record as U.S. stock-market investors return from a three-day weekend, awaiting minutes from the Federal Reserve's January meeting and data due later this week.

The S&P 500 (SP500) finished at a closing high Tuesday, after investors spent a choppy session with their attention on geopolitics and potential deal-making. The benchmark S&P 500 (SP500) ended +0.2%,