US Business Activity Index Rises to 58.4 as 10-Year Treasury Yield Hits 5.11%

Key Facts

The S&P Global flash US composite PMI rose to 58.4 in September from 56.0 in August, its strongest expansion since July 2021. The US Treasury's 10-year yield reached 5.11% on September 23, up from 4.96% on September 22, according to official daily data. Stronger activity and higher yields put US rate expectations at the center of the currency-market discussion, although their timing does not prove that the survey alone caused the bond move. For EURUSD, a higher US yield can make dollar assets more attractive if expected European returns do not rise in step. The available price record does not show the pair's move around the survey release, so a direct currency effect remains a scenario rather than an observed result.

Two financial reports inspected by EL7 put the market-implied probability of an October Fed increase at 69.7%, although the accessible CME page does not preserve a dated display of that particular reading. If accurate at the time it was reported, the figure means traders favored a 25-basis-point increase over a hold; it is changing market pricing, not a Fed decision. The Fed had raised its target range to 3.75%–4.00% on September 16 and said activity was expanding solidly while inflation remained elevated. That backdrop explains why investors would examine a survey pointing to sustained demand and cost pressure after the latest tightening decision. Futures prices can change the implied probability quickly, so 69.7% should not be treated as a fixed forecast through the meeting.

Treasury data show that the yield increase was not confined to longer bonds: the 2-year yield rose to 4.85% on September 23 from 4.71% on September 22. The 10-year yield climbed to 5.11% from 4.96% over the same interval, showing repricing at two points on the curve. Shorter maturities generally respond more directly to views of the near-term policy path, while longer maturities also reflect longer-run inflation, growth and risk estimates. The rise in the longer yield therefore cannot be assigned wholly to expectations for the Fed's next decision, even if reports show increased tightening bets. That distinction matters for EURUSD because the durability of dollar support depends on what drives US yields and whether European yields move with them.

The September survey's components show that the US improvement was more than one composite PMI reading. S&P Global reported strong services activity and renewed manufacturing improvement, alongside the fastest hiring in more than 4 years. It also reported rising backlogs and longer supplier delivery times, signs that firms faced pressure in meeting demand. Those details help explain bond investors' interest in the survey: stronger growth supports the activity outlook, but faster hiring and supply constraints can make relief from price pressure less certain. The flash reading is still a survey of business conditions and cannot by itself stand in for final measures of output or inflation.

On prices, the PMI compiler said US companies' input costs rose in September at their fastest pace in nearly 4 years, partly reflecting higher fuel and transport expenses. Selling-price inflation also quickened from August, though it remained below its pace in several earlier spring and summer months. The gap between cost increases and firms' ability to pass them to buyers matters because it shapes how much pressure persists in final prices. If investors expect those pressures to endure, futures may price a higher policy-rate path even while activity remains strong. If firms absorb costs in margins or later price readings cool, the case for further tightening can weaken without an immediate reversal in activity.

The European comparison does not show a stagnant economy on the other side of the Atlantic: the eurozone flash composite PMI rose to 53.1 in September from 52.0 in August, against the US reading of 58.4. Both surveys therefore showed expansion and improvement, although the US index was higher; their levels alone are not a direct measure of the growth-rate gap. The European Central Bank had raised its key rates by 25 basis points on September 10, taking its deposit rate to 2.50%. It said subsequent decisions would depend on incoming data, leaving its path sensitive to activity and price readings as well. EURUSD consequently depends on how expectations for both central banks change, rather than on the US release in isolation.

EL7's authoritative snapshot puts the September 23 EURUSD close at 1.13769, with a recorded high of 1.13895 and low of 1.13727 in the available bar. These are observed prices, not support or resistance levels established by a historical test, and they do not show the change from the preceding close. There is therefore no sufficient basis to say the pair fell during that session or to retain the original article's asserted technical support zone. If short-term US yields continue rising while European rate expectations hold steady, a wider expected yield gap could pressure the euro. If European expectations rise by a similar amount or US yields retreat, that channel could weaken despite the strong US activity reading.

For an EURUSD holder, the practical question is whether rate repricing persists after the survey is absorbed, rather than whether one probability reading settles a meeting that has yet to occur. A buyer can watch whether eurozone data and central-bank communication restrain a widening in the expected yield gap. A seller can test that position by watching whether the short-term US yield increase holds, since that maturity tends to respond more closely to views of the policy path. Short positions could reverse if US tightening bets fall, while long positions could face further pressure if those bets remain elevated. These are conditional scenarios based on forthcoming evidence, not confirmed EURUSD moves after the available price snapshot.

The Fed's official calendar sets its next meeting for October 27–28, the meeting to which the reported hike probability relates. Information arriving before then will test whether stronger activity combined with cost pressure warrants expectations of a higher policy path. The clearest confirmation would be persistent increases in shorter yields and futures pricing, assessed alongside EURUSD prices newer than the snapshot available here. Easing price pressure or a parallel rise in European rate expectations could instead weaken the case that stronger US activity alone will support the dollar. One day's bond move does not turn an implied probability into an official decision, so published data, market pricing and the future outcome should remain distinct.