On CNBC’s Talk of the Tape, host Dominic framed the show with a classic September warning — seasonally the softest month — and asked a panel of three whether to lean into the rally. Guests Anastasia Amoroso of Partners Group, Ryan Dietrich of Carson Group and Katie Stockton of Fairlead Strategies covered everything from Bitcoin hovering near $86,000 to the Mag-7 basket probing an intraday record. The September effect is the calendar anomaly that average September returns lag the rest of the year. Think of it like a tide that briefly pulls back at summer’s end before finding direction again. Picture an investor who steps back in early September and re-engages in mid-October; this broadcast questioned whether that old seasonal script still pays.
Amoroso argued three fear buckets were digested in the past two weeks: rising oil, wobble in AI momentum on safety worries, and higher rates. Oil eased from local highs, softening pump-price pressure; a steadier news flow around Meta and broader AI cooled the ‘momentum is over’ fear. On rates, even as the Fed and the Bank of Japan tightened, the U.S. economy stayed resilient, meaning growth kept moving while fears were priced in. Resilience here is consumption and hiring not slamming the brakes when rates rise — like a truck that upshifts on a slope without stalling. A quick scenario: a portfolio manager with a 10-page inflation brief sums it up in one line — rates rose, but demand and profits haven’t folded yet.
Valuation was the spine of the discussion. The S&P 500’s forward price-to-earnings multiple compressed from around 23 times to about 19 times. Forward P/E tells you how much you pay for $1 of next-12-month expected earnings; at 19 you pay $19 for $1 of forward profit, and its inverse, earnings yield (~5.2%) , is the handy comparator to bond yields. That compression, the panel argued, priced in risks and let value re-emerge. If the 2027 consensus of $407 in S&P earnings per share fully materialises, a 19-20 multiple points roughly to 7,800-8,000. The steps are simple: 1) aggregate consensus earnings, 2) apply a through-cycle multiple, 3) derive a target. The takeaway is not one number but the assumption behind it — continued earnings momentum carries the target; miss the earnings and the target slips.
Ryan Dietrich built the other half of the picture around seasonality and rotation. The Mag-7 basket’s intraday record raised the ‘narrowing leadership’ question, but he called rotation the lifeblood of a bull market and saw Mag-7 retaking the baton as healthy. The tape jumped after the Fed six weeks ago, then went flat for four weeks with weekly moves under 1%; the S&P went 37 days without even a 1% daily pullback. ‘Don’t short a dull market’ applies here — dull often prefaces the next directional leg. Bitcoin’s return to $86,000, the highest since January, was linked to a Fed perceived as more dovish than expected. For the second half of September, Carson’s view is upbeat: September gained over 2% in each of the last two years, and a similar surprise rally could repeat. A mini example: a portfolio down 1.5% in the first half can finish the month up if the second half adds 2.8% — that snap-back is the bet Dietrich is making.
Seasonality has to be read alongside the election cycle. Historically September averages a negative return for the S&P 500, the only month with that distinction, but dispersion is wide and the last two years broke the pattern. Carson’s early-September note ‘Here comes the worst month of the year’ flagged a choppy first half and relief after the Fed week. Add a midterm year and uncertainty rises, yet October-December has historically offered a stronger seasonal runway. The midterm cycle means policy and spending uncertainty tends to cluster in late summer, like contractors’ calendars jamming in the final weeks of a renovation. The practical point: the calendar alone does not decide — catalysts (Fed, earnings, geopolitics) overrule it.
On technicals, Katie Stockton said the recent consolidation interrupted rather than reversed the uptrend. A quick snap-back from short-term oversold conditions showed the primary advance remains dominant. For durability, she argued leadership must extend beyond mega-caps to semiconductors and the broader AI trade; when breadth is soft, one pillar cannot hold the building. Support around 6,180 and the psychological 7,000 handle were tested and held as buyers stepped in — like a sudden cluster of bids stacking on the order book. Gaps higher in semiconductors and breakouts in mega-caps today flashed risk-on. Momentum is not what it was a year ago, but the trend is intact — slower, yet still pushing uphill like a cyclist who eased off the sprint but kept climbing.
Together the show offered a three-layer synthesis: fears digested, multiples cheaper and earnings lifting targets, while rotation and seasonality will either confirm or brake the story. Oil remains a watch item with Middle East supply risks still lifting pump prices, yet the Fed’s September 17 quarter-point cut to 4.00-4.25% and guidance for two more cuts this year pulled the market toward a dovish read. In Japan, the policy rate moved to three-decade highs, refocusing global rate differentials. Bitcoin back at $86,000 after eight months and weekly ETF inflows near $1.7 billion show risk appetite spilling into crypto. The watchlist is clean: will earnings revisions keep grinding higher, will semis carry leadership, and will late September follow the long-run average or repeat the last two years’ upside surprise?
Key moments
AI commentary
"What stands out to me is not a fearless market, but a market that priced and digested its fears. Multiple compression creates value while earnings momentum lifts targets — yet the quality of rotation and the second half of September will test that thesis."
AI assessment
Steel-manning the other side: saying fears were digested does not mean risks vanished — only that they were priced. An oil supply shock, an AI safety or regulatory headline, and a higher-for-longer rates repricing could return together and make 19 times look expensive overnight. The $407 for 2027 also leans heavily on mega-cap tech and semiconductor profitability; wobble that narrow base and an 8,000 target quickly becomes 7,400.
Methodological limits matter too. This is a single panel session; stats like 37 days without a 1% drop and four flat weeks are striking but sample-thin and regime-dependent. The 6,180 and 7,000 supports are technical lines, not fundamental floors, and stay fragile without volume and options positioning confirmation. The Bitcoin-Fed linkage is also episodic; weekly ETF inflows near $1.7 billion are strong, yet one weekly turn after eight months down does not prove a trend.
On incentives and verifiability, all three voices come from institutional research houses with their own models and flows, and Fairlead’s technical framework leans on history. That is not a conflict, but it calls for verification: don’t lock in a ‘dovish Fed is certain’ view without Fed minutes, FactSet consensus and exchange data. External shocks like the Bank of Japan at three-decade highs can narrow the Fed’s room.
Practically, the story argues the window is open for sidelined cash that sat out on the ‘weak September’ script — not for leveraged bets without risk control. A balanced take: track earnings revisions, don’t overweight until breadth recovers in semis and mega-caps, and use staged buying plus stop discipline for late-September volatility. The 8,000 target is a compass, not a calendar; earnings will draw the path.
Sources
7 links; no other published story cites them. Stories sharing a link do not confirm each other; a source's origin is not inferred from how often it is cited.
- @youtube.com YouTube — CNBC Talk of the Tape: Fears, Rally and S&P 8000
- @cnbc.com https://www.cnbc.com/2025/09/17/fed-rate-decision-september-2025.html
- @carsongroup.com https://www.carsongroup.com/insights/blog/here-comes-the-worst-month-of-the-year-2
- @dollarliquidity.com https://dollarliquidity.com/en/valuation/sp-500-forward-pe
- @cnbc.com https://www.cnbc.com/2026/09/21/bitcoin-price-crypto-rally.html
- @cnbc.com https://www.cnbc.com/2025/10/08/fed-minutes-september-2025.html
- @cnbc.com https://www.cnbc.com/2025/12/19/bank-of-japan-boj-rate-cpi-inflation-takaichi-ueda.html
sp500 · fed · mag7 · bitcoin · september effect