The MSCI's broad gauge of world stocks was steady (.MIWD00000PUS), with Wall Street markets closed for the Juneteenth holiday.
After a week in which the stock market cheered the Fed's decision to skip a rate increase in June, Powell is scheduled to deliver congressional testimony on Wednesday and Thursday.
"The obvious narrative of AI has dominated this rally in tech stocks," said Dan Cartridge, portfolio manager at Hawksmoor.
"But a lot of it is also to do with interest rate expectations," he added, warning that the Fed staying hawkish would mean "we quite quickly see valuation compression again."
Two-year British government bond yields , which reflect rate expectations, added 6 basis points (bps) to around 4.94% - near last week's 15-year high.
Persons:
25bps, Jerome Powell, Powell, Hawksmoor, Hong, HSI, Goldman Sachs, Brent, Naomi Rovnick, Stella Qiu, Christopher Cushing, Tom Hogue, Gerry Doyle
Organizations:
of England, Nikkei, Global, . Federal, Wall, Bank of England, Japan's Nikkei, People's Bank of, Friday's dovish Bank of Japan, European Central Bank, Thomson
Locations:
China, SYDNEY, Europe, U.S, Asia, Beijing, People's Bank of China