Bank of Japan Holds Rates at 1% as Yen Volatility Spikes

The Bank of Japan is keeping its policy rate at 1 percent following a confirmed currency intervention that sent the Japanese yen surging against the US dollar. Authorities stepped in overnight with yen buying and dollar selling, pulling the currency off a forty year low in its biggest single day jump since early last year. The USD and JPY pair tumbled from above 163 down to 158 before climbing back above 160 as the immediate impact began to fade.

This rapid bounce highlights how quickly currency moves can unwind without sustained backing from the central bank. Analysts note the intervention happened during a favourable window with a weaker dollar and calm risk sentiment. Even so, market watchers expect policymakers to maintain a firm tone at today's meeting, with some polls pointing toward another rate hike before the end of the year.

Meanwhile, the Federal Reserve recently held US rates steady, which weakened the dollar broadly and narrowed the rate gap between the two countries. Traders rely on this interest rate spread to fund the popular yen carry trade by borrowing cheap yen to buy higher yielding assets. Any unexpected strengthening of the yen or further narrowing of rate gaps could force traders to unwind these large positions quickly, creating ripples across global markets.