New York - Wall Street stocks opened flat on Thursday after the Bank of England enacted a more aggressive monetary stimulus package than analysts expected.
The Boe slashed interest rates to a record low 0.25%, delivered a $227bn stimulus package in the wake of the nation's June 23 vote to leave the European Union.
British stocks rose 1.7%, while the pound declined.
The US market's muted reaction reflects misgivings that excessive central bank policy is "driving investors into riskier assets," said Briefing.com analyst Patrick O'Hare.
Five minutes into trade, the Dow Jones Industrial Average was 18 362.70, up less than 0.1%.
The broad-based S&P 500 slipped less than 0.1% at 2 163.58, while the tech-rich Nasdaq Composite Index was also slightly negative at 5 159.19.