
The yen strengthened slightly against the dollar on July 31 ahead of the Bank of Japan decision, which was expected to include the first policy tweaks since 2016. The dollar had eased more than 2% from a six-month high set on July 19.
The BoJ had conducted special bond purchases to contain rising yields.
A BoJ shift away from stimulus supports the yen and weighs on the dollar, which can modestly lift dollar-priced commodities. The effect on feed markets is indirect.
Not enough comparable past events yet for a historical read.
After 1,637 past bearish macro events, US Dollar (Broad) moved a median -0.2% over 5 sessions (39% higher; middle half -0.6% to +0.3%), and -0.2% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.