By Caitlin McCabe

U.S. stocks are set to close out a blockbuster quarter with fresh momentum.

Major indexes are marching toward their best quarterly gains in years. The S&P 500 was up 14% through Monday, and the Nasdaq had jumped 20%-the biggest quarterly rallies for both since the second quarter of 2020.

Those gains have come amid a remarkably volatile quarter, including as recently as last week, when tech stocks sold off. Investors have returned to the trade again this week.

Meanwhile, investors are monitoring for updates out of the Middle East, after President Trump said Monday that the U.S. will meet with Iran in Qatar on Tuesday. An Iranian official said Monday that Tehran hadn't decided on the timing of the discussions. Oil prices are creeping higher ahead of the expected talks.

Traders are also on high alert for currency intervention in the Japanese yen, which is hovering near a 40-year low.

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