September brought a synchronized wave of monetary tightening as three of the world's major central banks raised interest rates in response to persistent inflation. The European Central Bank lifted its key rate to 2.50%, the Federal Reserve followed with a hike to a 3.75%-4.00% target range, and the Bank of Japan raised its policy rate to 1.25%, the highest since 1995. Only the Bank of England held steady, and even that decision was split 6-3.
Just a year ago, the debate among forecasters centered on how many rate cuts were expected in 2026. Now, with inflation driven largely by oil prices tied to Middle East tensions, the question has flipped to how many more hikes lie ahead.
Inflation data: the catalyst
US headline CPI rose 3.4% year-over-year in August, unchanged from July. Core CPI, excluding food and energy, rose 0.3% month-over-month, above the 0.2% forecast and the fastest monthly pace since April, though the annual core rate held at 2.4%. Producer prices ran even hotter, with PPI climbing 5.4% year-over-year, up from July's 4.8% and above expectations.
None of these figures alone is dramatically above target, but their convergence in the same week before the Fed's meeting signaled that price pressures were not cooling as earlier forecasts had assumed. For traders, the practical takeaway is to watch CPI and PPI prints in the weeks before scheduled central bank meetings, not just the meetings themselves, as that is what allowed bonds, the dollar, and gold to get ahead of the announcements.
Bonds: yields cross a threshold
The 10-year US Treasury yield touched just above 5% in the days before the Fed's decision, its first move above that level since October 2023 and only the second time since the 2007-08 financial crisis. The 30-year yield reached above 5.3% over the same stretch. The move was driven not only by the Fed's hike but also by hot CPI and PPI readings that pushed the market-implied probability of a hike from around 60% to briefly above 90% within days. Heavy Treasury issuance and a possible unwinding of the yen carry trade added further pressure on the long end.
The Fed's dot plot did little to calm markets: 16 of 18 officials still project further tightening this year, with the median 2026 rate forecast rising to 4.1% from 3.8% in June.
Dollar: pushed to multi-month highs
The US Dollar Index climbed to around 100.30-100.50 in the days around the Fed decision, its strongest level in roughly seven weeks. The move reflects more than the Fed hike itself. With the Bank of England holding while the Fed and BOJ both raised, the rate gap between the US and UK widened, weighing on sterling. The yen's reaction to its own hike was less straightforward, with some initial strength giving way to renewed weakness as traders focused on the size of the move relative to how far US rates had already climbed.
Gold: headline dip, then partial recovery
Gold fell in the immediate aftermath of the Fed's hike, dipping to around $4,264-4,270, but recovered part of that move within hours as Treasury yields eased back from their post-decision spike. Because gold's opportunity cost depends on real yields rather than the headline rate alone, a Fed hike doesn't automatically mean a lower gold price if inflation expectations move at the same time.
Notably, global gold ETFs added around $18 billion in August alone, lifting total holdings to a record 4,189 tonnes, and that inflow streak continued straight through the September hike. This contrasts with prior hiking cycles, where gold holdings were typically reduced heading into tighter policy.
Equities: measured reaction
US equities fell on the day of the Fed's decision, but not sharply. The S&P 500 declined by less than half a percent, the Dow fell around 1.2%, and the Nasdaq was little changed. That is consistent with a decision the market had already largely priced in through prior weeks of CPI, PPI, and Fed commentary. Historically, Goldman Sachs research points to an average 2% decline in the S&P 500 in the months immediately following a rate hike, followed by an average 9% gain over the following year. Whether this cycle follows that pattern will depend heavily on whether the Fed's dot plot forecast of further 2026 tightening actually materializes, or whether cooling inflation data over the coming months takes additional hikes off the table.
This article is for informational purposes only and does not constitute financial advice.
