August's Exit, September's Reckoning
August closed green — the best in years for the Nasdaq — but September opens with a hawkish Fed, a re-heating conflict with Iran, and a jobs report on Friday that will decide whether a rate hike lands in two weeks.
August went out the way much of it was traded — uneasily. The S&P 500 slipped 0.33% Monday to 7,686.14 and the Dow shed 374 points, dragged by Goldman Sachs and Alphabet, as renewed hostilities between the U.S. and Iran jolted a market already digesting a hawkish Fed. Yet step back and the month was a winner: every major index finished August higher, with the Nasdaq up nearly 4% for its best August since 2021. That tension — a strong month ending on a nervous note — is the whole setup for September.
| Item | Where it stands | Why it matters |
|---|---|---|
| August close | S&P ~+2.6%, Nasdaq ~+3.9% | Best August since 2021; every index up. |
| U.S.–Iran | Renewed strikes over the weekend | A fresh oil and inflation risk into September. |
| Fri | August jobs report | The last big data before the Fed's September meeting. |
| The Fed | Sept hike odds ~57% | Warsh left a rate increase firmly on the table. |
The war comes back to the tape
The weekend brought the first publicly acknowledged U.S. strikes on Iranian positions in about a month, and Tehran's reported retaliation against U.S. bases in the region. Oil, already firm, has every reason to stay bid. The read-through is direct: higher energy prices feed the inflation Warsh says he is still fighting, which stiffens the case for a September hike. Global bond markets felt it immediately — short-term yields pushed higher from Tokyo to Frankfurt to start the week.
A green August is already in the books. September's question is simpler and harder: does the Fed hike into a slowing economy — and does Friday's jobs report make it easy or impossible?The Monday Outlook
Why Friday is the fulcrum
Everything funnels toward the August payrolls report. After Warsh's Jackson Hole signal, a strong number would all but confirm a hike at the Fed's meeting later this month; a weak one would pit his hawkish stance against a labor market that may be cracking. With inflation sticky, oil rising and growth already cooled to 1.5%, there is little margin for a surprise in either direction.
August ended strong but fragile. September opens on three live wires — a hawkish Fed, a re-heating war, and Friday's jobs report. Watch oil and the 2-year yield early in the week; they will tell you how hard the hike case is hardening before the payrolls print settles it.