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Today’s Short, Free Insights
Bullish sentiment fell to just 28.8% in this week’s AAII survey, despite the S&P 500 remaining close to all-time highs. Historically, similar setups were followed by positive SPX returns one month later in 100% of cases, with a median gain of 3.2%.
As always, this is just one data point. We’ll discuss our view in an upcoming MI Words article and on Sunday via MI Clips.
The S&P 500 closed 0.4% lower following the Fed’s first rate hike of the new tightening cycle. That marks the first negative first-hike-day close since 1997, when Alan Greenspan chaired the Federal Reserve.
Fed Chair Kevin Warsh has concluded his FOMC press conference following today’s 25 bps rate hike.
The Fed unanimously raised rates by 25 bps to 3.75%–4.00%, with the updated FOMC projections pointing to one additional 25 bps hike in 2026. Policymakers said the move should support a more timely return of inflation toward the 2% target.
During the press conference, Kevin Warsh argued that the rise in the 10-year Treasury yield has largely reflected a stronger economy rather than excessive policy restraint.
Markets nevertheless reacted negatively. The 2-year Treasury yield climbed to its highest level since July 2024, while the S&P 500 fell to a fresh session low as Warsh’s press conference concluded.
The S&P 500 fell to a fresh intraday low shortly after Kevin Warsh began speaking at the FOMC press conference.
The index had already seen sharp two-way volatility following the Fed’s 25 bps rate hike, but selling pressure intensified as the press conference got underway. For now, the price action suggests markets are reacting more sensitively to the Fed’s forward guidance and Warsh’s tone than to the hike itself, which was largely anticipated.
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Premium Short Insights & Articles
Here is a list of all current S&P 500 stocks and their performance on September 18 to September 25 for every year with available historical data. Returns are calculated using the closing prices on the mentioned start and end dates. If the market is closed on any date, the closing price from the prior trading day is used. The attached screenshot highlights the qualifying stocks from the Excel workbook’s Overview sheet.

You can find the complete dataset in the Excel sheet here:
sp500_positive_between_dates_close_to_close_client_ready
Note: This stock list is published every week, regardless of whether we identify stocks that meet our highest conviction standards. The objective is to highlight stocks with the strongest historical positivity rate for that specific calendar date. It is intended as a supporting research tool for active traders and should not be interpreted as a recommendation to buy or sell any security.
The portfolio’s average historical performance is provided solely for reference to illustrate how the group has performed collectively on that date in the past. Historical performance does not guarantee future results, and not every day’s list represents a high-conviction opportunity. Please conduct your own research before making any investment decisions.
For investors seeking our highest-conviction ideas, Premium Plus members receive access to our Berry Picks model portfolio under the Model Portfolio section. Berry Picks are selected from more than 30 proprietary research themes, with preference given to stocks that consistently appear across the greatest number of themes.
None of the stocks listed constitute investment advice.
Here is a complete list of current S&P 500 stocks and their historical performance on September 18 for every year since 2010 with available data. The attached screenshot highlights the qualifying stocks from the Excel workbook’s Overview sheet.

The full dataset, including all stocks currently within the S&P 500 index and historical observations, is available in the Excel file linked below.
sp500_positive_on_given_days_exact_only
Note: This stock list is published every trading day, regardless of whether we identify stocks that meet our highest conviction standards. The objective is to highlight stocks with the strongest historical positivity rate for that specific calendar date. It is intended as a supporting research tool for active traders and should not be interpreted as a recommendation to buy or sell any security.
The portfolio’s average historical performance is provided solely for reference to illustrate how the group has performed collectively on that date in the past. Historical performance does not guarantee future results, and not every day’s list represents a high-conviction opportunity. Please conduct your own research before making any investment decisions.
For investors seeking our highest-conviction ideas, Premium Plus members receive access to our Berry Picks model portfolio under the Model Portfolio section. Berry Picks are selected from more than 30 proprietary research themes, with preference given to stocks that consistently appear across the greatest number of themes.
None of the stocks listed constitute investment advice.
The U.S. 10-year Treasury yield closed above 5% for the first time since 2007 after remaining below the threshold for more than a year.
Historically, breaks above major yield thresholds have often coincided with near-term volatility for the S&P 500. Across the prior seven completed cases, the index was lower three months later in four.
Interestingly, seven of the eight signals since 1960 occurred during midterm years. The only other case was in 2013, just 4 days before a mid term year.
The U.S. 10-year Treasury yield is back in the 5% handle, a level that has historically coincided with a more challenging backdrop for equities.
Looking at S&P 500 performance across different 10-year yield regimes, the 5% handle stands out. Among yield handles from 0% through 10%, it has produced the lowest average S&P 500 forward return over 3, 6, 9 and 12 months. The 3- and 6-month positivity rates are also the lowest of those regimes.

A 5% risk-free yield raises the discount rate applied to future corporate cash flows, increases the hurdle rate for capital deployment and gives investors a materially more competitive alternative to equities. That can compress valuation multiples even when underlying earnings remain resilient.
This does not imply that stocks cannot advance from here, nor does it alter a longer-term bullish thesis by itself. We think this aligns with our base case of weakness in September with a possibility of extending into October. We still see S&P 500 making new highs and reaching 8100 by year end. We think the level of 7300-7400 could provide a good support for the S&P 500.

Credit to Bespoke Investment Group for the original regime framework this analysis is built on.
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Real-Time Alerts on Critical Developments
MI Clips -
Is “AI Safety” a Cover Story? Plus Our S&P 500 Outlook for the Week (09/14–09/18)
This week’s Market Insight Clip breaks down two major stories:
The AI Pacing Story: Dario Amodei’s call to “slow down the frontier” sparked a wave of CEO agreement from Elon Musk and Sam Altman. We dig into the suspicious timing and the account that started it all, and lay out why we think this narrative may be less about safety and more about trillion-dollar monetization pressure, open-source competition (Kimi AI, DeepSeek), and Treasury yield dynamics.
S&P 500 Weekly Outlook (09/14–09/18/2026): 3 reasons we expect a negative week:
- AI-pacing shock headlines (Monday)
- FOMC decision under Fed Chair Warsh (Wednesday)
- September triple witching (Friday) — S&P 500 has closed lower 12 of the last 14 years on this day
We also cover our expected S&P 500 structure through year-end, key support/resistance levels, and our 8,100 year-end target (set December 2025).

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