US stocks fell as investors awaited Thursday's consumer price index reading. Treasuries rose, while UK markets were roiled once more by uncertainty about the country's policies.

The S&P 500 fell into the red in the final minutes of trading, capping a six-day losing streak. After minutes from the Federal Reserve's most recent meeting suggested that some officials may consider calibrating the pace of rate increases, equities faded a brief rally. The consumer price index reading will be the final significant data point before the central bankers meet next month.

Prices paid to US producers rose more than expected in September, according to data released today, ahead of a key measure of consumer inflation due on Thursday, which is expected to return to a four-decade high.

Earlier today, Minneapolis Fed President Neel Kashkari reaffirmed policymakers' commitment to the current rate-hike path, saying the bar for a shift away from monetary policy tightening is "very high."