The latest US Producer Price Index (PPI) data and the European Central Bank's (ECB) policy decision, both released on the evening of September 10 Beijing time, jointly underscored how surging oil and gas prices amid the worsening Middle East geopolitical crisis are constraining the dovish or neutral monetary policy stances of global central banks. With energy inflation sounding the alarm once again, traders in European and US markets are reassessing the upper limits for interest rates.

As widely anticipated by the market, the ECB announced a 25-basis-point rate hike, raising its deposit facility rate to 2.50%. The core signal from the ECB is that the disinflation process is slower and the economy's capacity to absorb higher rates is stronger than officials had previously projected. Compared with the economic projections published in June, the ECB maintained its 2026 inflation forecast at 3.0% for the full year, with upward revisions concentrated in 2027 and 2028. Growth forecasts for the same period were also revised higher, which effectively preserves room for further rate increases, though the central bank continues to emphasize a meeting-by-meeting approach, with market pricing for subsequent hikes representing no policy commitment.

US final-demand PPI rose 0.4% month-over-month in August, matching the consensus expectations reported in pre-market coverage. However, the year-over-year producer inflation gauge rose 5.4%, slightly exceeding the 5.3% forecast, making it accurate to describe the reading as slightly above expectations on an annual basis. Energy prices climbed 4.2% month-over-month, with diesel prices surging 24.1%, reflecting how the fuel supply shock originating from the US-Iran conflict and its intensifying dynamics are pushing up production and transportation costs. That said, PPI excluding food, energy, and trade services rose 0.3% month-over-month, below July's 0.4%. While this alone does not suggest all price pressures are accelerating, traders responded to the PPI release by pricing in nearly an 80% probability of a Fed rate hike in October. The 30-year US Treasury yield climbed to around 5.34% following the PPI data, reaching its highest level since 2007, while the Nasdaq 100 futures, often viewed as a bellwether for tech stocks, fell more than 1%, with AI computing-related stocks declining broadly in pre-market trading.

Middle East Conflict Priced Into Rate Paths: ECB Acts Again

The ECB raised interest rates for the second time since the Iran war began in February, responding to signs that inflation could remain significantly above 2% for an extended period. On Thursday, the deposit rate was increased by 25 basis points to 2.5%, matching the projections of nearly all economists surveyed by Bloomberg. The ECB reiterated that it will not pre-commit to future moves and will decide meeting by meeting based on incoming data. European rate futures traders anticipate additional action, stepping up their bets after the announcement and now pricing in three more rate hikes by October 2027.

The ECB stated in its declaration: "The Middle East conflict continues to generate inflationary pressures, and inflation is expected to remain significantly above target for an extended period. The outlook remains highly uncertain, with upside risks to inflation and downside risks to economic growth." Soaring energy prices have pushed inflation to its fastest pace in nearly three years, and Thursday's action puts eurozone policymakers further ahead of other major central banks in responding to this shock. Traders now expect further ECB moves, with the market pricing in two additional hikes by mid-2027.

The chart above illustrates central bank watch data, tracking changes in benchmark borrowing costs across global central banks year-to-date. The map reflects rate changes since the beginning of 2026. This contrasts with the Federal Reserve and the Bank of England, both of which have yet to tighten policy in response to the Middle East conflict and may also hold steady next week. The ECB's decision incorporated its latest projections: inflation averaging 3.0% this year, easing to 2.5% in 2027 and 2.1% in 2028. With eurozone second-quarter growth accelerating notably, the full-year growth forecast was revised up to 0.9%.

The chart above shows the ECB's latest inflation and growth projections. ECB President Christine Lagarde is scheduled to face journalists in Berlin at 2:45 PM, amid continuing speculation about her possible early departure. The ECB holds one meeting per year outside its Frankfurt headquarters, and this year's venue is Berlin. With oil prices reaching $100 per barrel and European natural gas prices rising to levels not seen since the winter following Russia's invasion of Ukraine, the 21-nation eurozone saw consumer prices rise 3.3% year-over-year in August. However, some more encouraging signals have emerged: underlying inflation and a closely watched services price gauge have both retreated, and wage pressures have also eased.

As shown above, energy has driven eurozone inflation to a three-year high, while underlying price pressures and services inflation have moderated. Source: Eurostat. These developments should help alleviate concerns among some officials who argued at the ECB's July meeting that a "modestly restrictive" policy stance might be necessary to bring inflation back to target. Reaching that level would require the deposit rate to rise above 2.5%, which is widely considered the upper bound of the neutral rate range that neither stimulates nor restrains economic activity. ECB Governing Council member Gediminas Šimkus of Lithuania has already indicated that the central bank is unlikely to conclude its hiking cycle after this week, while his Bulgarian colleague Dimitar Radev suggested that action remains possible at the December meeting.

The economy's unexpected resilience could facilitate further tightening. Following major revisions to Irish data, eurozone second-quarter output grew 0.6% quarter-over-quarter. Meanwhile, digital investment and government spending on infrastructure and military have driven manufacturing to expand at its fastest pace in over four years. Camille Kowal, head of eurozone economic research at Moody's Analytics, noted that the ECB's recognition of surprisingly strong growth, combined with higher inflation projections, "indicates the Governing Council is open to further rate hikes, raising the probability of a third increase. Even if energy prices retreat from this week's levels, we currently see a 50% probability of a third hike."

Inflation Extends the Battle: Equity Valuations Face Cash Flow Scrutiny

For European inflation expectations, this rate hike is primarily aimed at preventing the energy shock from spreading persistently through corporate pricing, wage negotiations, and inflation expectations. Rate increases work by constraining credit and demand, but they have limited effect on improving oil and gas supply. Therefore, the effectiveness of the ECB's monetary policy depends on whether energy price increases can be contained within a relatively limited scope. Current easing in underlying inflation and wage pressures provides room for gradual adjustment, while upward revisions to 2027-2028 core inflation forecasts indicate the central bank still worries about the lagged transmission of cost pressures.

For the European economy, the upward growth revision increases the policy space for continued inflation fighting, but the 0.6% second-quarter growth includes the impact of Irish data revisions and cannot be fully interpreted as broad-based strength in consumer spending and corporate demand. Energy price increases compress real purchasing power, while rate hikes raise housing and corporate financing costs; both will continue to weigh on domestic demand, partially offset by digital, infrastructure, and defense investment. From this perspective, Europe is more likely to see divergent sector performance, where a company's ability to pass on costs, maintain orders, and control leverage matters more for investment decisions than headline growth revisions alone.

For global equity investment strategy, these developments undeniably intensify concerns about rising inflationary or even stagflationary pressures from global tariffs and geopolitical deterioration, alongside fears that global stock markets are heading toward another round of sharp volatility. This combination of fresh inflation data, the ECB rate hike, and the central bank's economic projection summary raises the necessity of scrutinizing valuations and financing costs: if inflation forces rates to stay elevated, companies dependent on distant profits, high-leverage expansion, or frequent refinancing will face greater pressure, while companies with pricing power, stable free cash flow, and solid balance sheets hold a comparative advantage. Energy producers may benefit from higher prices, while airlines, transportation, and energy-intensive manufacturers face tougher tests on cost pass-through ability.

The slightly above-forecast US PPI reading increases the significance of the upcoming CPI release, but neither a single month of PPI data nor the ECB's rate hike alone can determine the Fed's next move. In particular, this ECB hike was widely expected, so subsequent market direction will depend more on how rate paths and earnings forecasts evolve. What is beyond dispute is that the shift from highly concentrated AI and US large-cap growth trades toward portfolios that retain structural AI longs while adding low-correlation, high-cash-flow, low-valuation assets is accelerating. This is the alpha strategy combination unanimously recommended by Wall Street strategists amid rising inflation and climbing Treasury yields — namely, rotating from AI computing themes with historically extreme leverage positions and highly crowded high-beta momentum trades toward alpha trades centered on "quality cash flow compounding plus valuation dislocation."

With the AI bull market entering a phase of "high valuations, high crowding, and high capital consumption," the team led by Bank of America senior strategist Michael Hartnett, often dubbed "Wall Street's most accurate strategist," published a research note advocating shifting marginal capital from the most expensive AI computing beta toward "cheaper earnings growth, genuine cash flow, and inflation-resistant assets." This represents a rebalancing from a single tech focus toward broader market earnings and high-quality cash flow sectors — not the end of the AI bull market.