S&P 500 Hits Record High Adding $11 Trillion in Market Value Since March

The S&P 500 closed at its highest level on record, marking a 19 percent gain since its March 30 bottom. That advance has added $11 trillion in market capitalization in under seven weeks. The rally reversed earlier losses for many of the largest companies.

Nvidia, for example, stood 11.4 percent lower for the year on March 29 with a market value of $4.0 trillion. Since then the stock has climbed 42.7 percent, lifting the company's market capitalization to $5.7 trillion.

The swift rebound pushed major indexes beyond previous peaks within a compressed timeframe. Trading activity reflected renewed investor confidence after the March low, though specific drivers were not detailed in available reports. The performance underscores the scale of value created in equities during the recovery period.

The $11 trillion increase equals one of the largest short-term wealth gains recorded in U.S. markets.

Nvidia's share price surge outpaced the broader index during the same window. The company's market value rose by $1.7 trillion between late March and mid-May as its stock advanced more than 40 percent. The semiconductor firm's gains contributed materially to the S&P 500's record close.

Its performance followed a year-to-date decline of more than 11 percent as of March 29. >"Nvidia on March 29— • YTD: -11.4% • Market Cap: $4.0 trillion Nvidia since— • Return: +42.7% • Market Cap: $5.7 trillion" — Market data summary, May 2026 (Morning Brew).

The contrasting snapshots illustrate the speed of the turnaround for one of the largest U.S. companies by market value.

Equity markets have now erased losses sustained earlier in 2026 and moved into positive territory for the year. The record close comes amid ongoing economic data releases and corporate earnings that have supported sentiment. No single catalyst was identified across reporting on the milestone.

Instead, cumulative buying pressure since late March lifted the index through prior resistance levels to establish the new high.