September 23, 2026 · Market figures as of approximately 10:30 a.m. ET
The first reading of September U.S. business activity pointed to an economy gaining speed. The S&P Global flash composite purchasing managers’ index rose to 58.4 from 56.0 in August, its strongest expansion in more than five years. Stocks fell anyway. The reason is the other half of the report: costs are climbing, oil has resumed its rise, and Treasury yields moved above 5%.
What the September flash PMI means for stocks
A reading above 50 indicates expansion. At 58.4, the September flash composite PMI signaled faster growth across U.S. private businesses. Stronger activity can help revenue and earnings. But the preliminary survey also indicated faster input-cost growth, partly linked to fuel. If companies pass those costs on, inflation can remain stubborn even while output grows.
That combination matters for stock prices because higher inflation can keep interest rates elevated. Growth-sensitive and richly valued shares are particularly exposed when the yield used to discount future earnings rises. The report is preliminary, so the final September reading may differ.
Oil and the 10-year Treasury yield set the tone
Brent crude was near $101.59 a barrel after the first hour of U.S. trading Wednesday, up 2.4% on the day, according to Associated Press market reporting. The 10-year Treasury yield reached 5.05%, compared with 4.96% late Tuesday. After the first hour, the S&P 500 was down 0.6% and the Nasdaq composite 1.1%. These are intraday readings, not closing prices.
The useful question is whether crude and yields remain elevated into the close. A good growth figure alone does not settle the market’s verdict when the same release also raises the cost and rate outlook. The New York Fed’s economic calendar shows weekly initial jobless claims and new-home sales on Thursday, September 24. Those releases may change how traders read today’s rate move.
What PrimeFlow’s closed trade log added this week
PrimeFlow’s public closed trade log, updated September 22, lists two newly recorded closes: ULCC entered September 21 at $6.03 and exited September 22 at $6.39, a documented underlying-stock move of +5.97%; CLSK entered September 18 at $13.84 and exited September 22 at $14.39, a documented move of +3.97%. These are selected individual closes, not account returns or typical results. The full record includes losses. Neither result is presented as a 390 Method day trade, and past performance does not indicate future results.
One practical rule for a conflicting tape
Before trading a seemingly favorable headline, compare the reaction in the stock, its sector, crude oil and the 10-year yield. When the price action runs against the headline, pause before assuming the market is wrong. Define the level that would prove your idea invalid and the time of day when you will reassess it.
That is the kind of preparation taught in The 390 Method: premarket levels, day classification, a session clock and written invalidation. The course includes six lessons, 28 checkpoint questions, 11 printable reference sheets and lifetime access. Coupon PDT200 takes $200 off the $297 one-time price, making it $97. The 30-day policy provides full store credit, not a cash refund.
Educational market commentary only, not individualized investment advice. Trading stocks and options involves substantial risk, including loss of principal. Market figures are intraday as of approximately 10:30 a.m. ET on September 23, 2026 and may change.
