The effect of a declining dollar is likely to be subdued, said economist Eswar Prasad, since other nations are seeing weak economic growth.

The U.S. dollar has been sliding in the run-up to a widely expected interest-rate cut from the Federal Reserve on Wednesday and, depending on the size of the Fed’s move, it could end up weakening further — or it could be a buying opportunity.

The dollar weakened and the yen hit its highest level in more than a year on Monday, as market participants increasingly expected an oversized rate cut by the Federal Reserve later this week. The dollar fell to as low as 139.