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Bank of Canada governor Tiff Macklem and the bank’s Governing Council held course Wednesday, leaving their target for the overnight rate unchanged at 4.5 per cent. The day before, United States Federal Reserve chair Jerome Powell was considerably more hawkish, enough to convince markets that the 25-basis point increase in the federal funds rate that they were expecting from the Fed’s next setting is probably too low.

Does a more hawkish Fed mean the Bank of Canada will also have to hike further? We don’t think so.

In large part, the argument in favour of following the Fed has to do with the Canada-U.S. exchange rate, which has mainly depreciated since the tightening cycle began a year ago, and which matters for an inflation-targeting central bank like the Bank of Canada.

Some depreciations aren’t a problem. Suppose the Canadian dollar falls relative to the U.S. dollar because demand falls for Canadian goods. If that happens, foreigners require fewer Canadian dollars and our dollar depreciates — just as it would appreciate if the demand for Canadian goods rose. In such cases, the exchange rate acts as a shock absorber: a depreciation makes Canadian goods cheaper, causing a rebound in foreign demand. An appreciation does the opposite. Either way, monetary policy doesn’t have to, and probably shouldn’t, react.

But suppose the Canadian dollar falls relative to the U.S. dollar because investor preferences change — as, for example, when nervousness causes a flight to the U.S. dollar. That kind of depreciation will make Canadian exports cheaper for foreign buyers and imports more expensive for Canadians. That increases inflation here at home, and, as a result the bank may need to respond with tighter monetary policy.

In our view, even if the recent decline in the Canada-U.S. exchange rate is mainly due to global rebalancing toward the U.S. dollar — the so-called “safe haven effect” — and bumps inflation up a little, monetary conditions in Canada are still quite restrictive, which means the bank needn’t mimic further hikes by the Fed.

Real policy interest rates — calculated by subtracting inflation from nominal rates — are rising in Canada, and at a faster pace than in the U.S. And they’re what matter for monetary policy effectiveness.

The bank is targeting 4.5 per cent, while the range the Fed is aiming for is 4.5 to 4.75 per cent. But inflation is lower in Canada and is falling faster. Headline inflation in January was 6.4 per cent in the U.S., compared to 5.9 per cent in Canada. Real rates are still negative in both countries but less negative here. Those inflation numbers are year-over-year, however, which is mostly old information. Looking at one-month or three-month annualized rates of inflation, real interest rates are now moving into positive territory. And, because inflation is continuing to fall, the bank’s real policy rate will continue to rise even without further rate hikes. In effect, monetary policy will continue to tighten in Canada.

Our other main reason for believing the bank should not follow the Fed in lock step is that the Canadian economy is showing more signs of weakness than the American. Real growth in Canada was stagnant in the fourth quarter, compared to an annualized growth rate of 2.7 per cent in the U.S. In part, this reflects the fact that the bank began tightening before the Fed did. As the bank notes, this tightening has already reigned in the growth of spending. But since monetary policy operates with long and variable lags, it is prudent for the bank to pause and allow its rate hikes to have their full effect before considering further increases. Following the Fed’s policy rate upward could easily tip the Canadian economy into recession and make any downturn deeper and longer-lasting.

Steve Ambler is a professor of economics at Université du Québec à Montréal and David Dodge Chair in Monetary Policy at the C.D. Howe Institute, where Jeremy Kronick is director of monetary and financial services research.

Published in the Financial Post