OCBC FX Strategist Sim Moh Siong and Christopher Wong highlight that the Japanese Yen (JPY) has already benefited from aggressive market pricing for Bank of Japan (BoJ) tightening, with an 85% chance of a September hike implied. They argue further JPY gains may require additional policy tools beyond rate increases, such as measures to encourage repatriation of overseas assets, as BoJ faces constraints on how far and fast it can raise rates.

BoJ tightening expectations already rich

“A September move would break from the BoJ’s pattern in the current tightening cycle, where rate increases have typically come about every six months. The last hike was delivered in June. Even so, it will be difficult for the BoJ to out-hawk market expectations.”

“Japan’s rates market is already pricing an roughly 85% chance of a September hike, alongside a faster pace of tightening thereafter. Current pricing implies the policy rate rising from 1.00% to 1.75% by July 2027.”

“Given the constraints on how quickly and how far the BoJ can raise rates, additional measures may still be needed to counter more persistent JPY depreciation pressures. One option could be policies aimed at encouraging the repatriation of overseas assets.”

“Looking ahead, attention will turn to the September BoJ meeting, a potential Ueda-Takaichi meeting, and this week’s G20 Finance Ministers and Central Bank Governors gathering for further policy signals.”

“Future JPY gains may require policy support that goes beyond the pace and extent of rate increases.”