Bank of Canada Governor Tiff Macklem also said for the first time that the possibility the new administration of U.S. President-elect Donald Trump might impose tariffs on Canadian exports represented "a major new uncertainty."

The 50-basis-point cut, while widely expected, marks the first time since the pandemic that the central bank has implemented consecutive jumbo-sized cuts. In a Reuters poll of economists, 80%, or 21 out of 27 respondents, predicted that the bank would cut the overnight rate by 50 basis points. The rest forecast a quarter-point reduction.

"With the policy rate now substantially lower, we anticipate a more gradual approach to monetary policy if the economy evolves broadly as expected," Macklem said in opening remarks at a press conference.

The bank would be evaluating the need for further cuts one decision at a time, he said, noting that monetary policy no longer needed to be clearly in restrictive territory.

The policy rate is now at the top end of the bank's so-called neutral range, which is considered to be the band within which rates are just enough not to restrict growth but not stimulate it either.

"It says that the economy as a whole is not in an especially strong place," said Andrew Kelvin, head of Canadian and Global Rates at TD Securities. "The Bank of Canada would like to see growth pick up, which requires, on some level, a more active and robust consumer."

The Canadian dollar firmed up after the decision, with the loonie trading 0.29% stronger at 1.414 against the U.S. dollar, or 70.72 U.S. cents.

Currency markets are pricing in a 70% chance of a 25-basis-point rate cut in January.

Inflation is now at 2%, the bank's target, and Macklem reiterated that he wanted to see growth pick up.

Canada's economy grew at an annualized rate of just 1% in the third quarter, less than the Bank of Canada had predicted. The bank said fourth-quarter growth might be weaker than expected, and that planned reductions in immigration levels could cause 2025 growth to also fall short of forecasts.

Trump has promised to impose tariffs of 25% on all Canadian exports unless Ottawa moves to tighten the border, which Macklem said clouded the economic outlook.

"This is a major new uncertainty," Macklem said.

As well as analyzing the effect of immigration numbers, the bank will also have to take into account a temporary sales tax rebate and a possible one-time cash handout by the government.

Macklem said the bank would look through the effects that are temporary and focus on underlying trends to guide policy decisions.

"We are retaining our call that the Bank of Canada ultimately needs to take its policy rate down to 2.00% by early 2026 as we expect U.S. tariffs to eventually be applied to some Canadian exports," Royce Mendes, head of macro strategy for Desjardins Group, wrote in a note.

Mendes, who had called for a cut of 25 basis points, said he expects a number of pauses along the way.

With Wednesday's reduction, the bank has now shrunk benchmark borrowing costs five times in a row by 175 basis points in a space of six months, making it the only major central bank to have reduced borrowing costs at such a rapid pace.