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Welcome to the September 2026 edition of Blackrock's Student of the Market.
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This month, we'll look at the market that has continued to reward investors, but where the story beneath the headline is becoming more nuanced.
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We'll start with U.S.
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stocks and the historical patterns around midterm election years, then compare today's AI rally with the.com.
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From there, we'll examine how benchmark construction is shaping emerging market results.
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We'll finish with investor flows, the changing relationship between cash and bonds, flexible income strategies, and the potential role of alternatives.
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As always, the goal is not to predict the next market move.
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It is to use history and current data to put today's market environment into perspective.
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Let's begin on slide three.
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U.S. stocks have had an unusually strong start to the midterm election year.
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Through August, the market was up 13.14%, making 2026 the six best first eight months of a midterm election year in this nearly 100 year history.
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The left side provides important context.
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Across all midterm election years, the average return during the first eight months was only 1.62%, while the average return during the final four months average 5.56%.
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The table on the right narrows down the analysis to the 10 strongest starts.
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Those years gained 15.49% on average through August and another 5.7% over the final four months.
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The outcomes are not uniformly positive as 19861978, 2018 all declined from September through December.
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The takeaways?
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That strong momentum has often continued, but history provides context, not a forecast.
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Moving ahead on the next slide, the next question is whether September's reputation should change the outlook.
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Historically, September has been the weakest month for U.S.
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stocks with an average return of 0.78%, negative 0.78%.
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The pattern is slightly worse in midterm election years, when September averaged a -1 point O 9%.
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That seasonal weakness is real in the historical data, but it's only one month within a broader pattern.
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In midterm election years, the average returns for October, November, December were two point 452.80 and 1.17% respectively.
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So the historical message is not simply that September is weak, it is that difficult.
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September has often been followed by a stronger fourth quarter.
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Investors should avoid using seasonality as a market timing tool, but it can help set expectations for periods of normal volatility following a strong year to date rally.
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If markets experience weakness in September, it may present a reasonable opportunity for long term investors to put cash to work.
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Next, we look at technology leading the market.
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Comparisons with the dot com bubble are understandable.
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The data, however, shows that the the magnitude is very different so far.
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On the left, the technology sector's cumulative rise following the launch of ChatGPT remains remains well below the advance that followed the Netscape IPO.
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On the right, the contrast is more specific.
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Technology gained 360% over the three years ending in March 2000, compared with 127% over the last three years ending in August of 2026.
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Those numbers are cumulative.
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Valuations also differ sharply.
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The sector traded at 55 times forwardearnings@the.com peak versus technology trading at 21 times earnings today.
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This does not mean technology is inexpensive or immune to a correction.
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It means the current AI driven rally has been more measured in both performance and valuation than the late 1990s experience.
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Switching gears to emerging market stocks, they're a great example of why benchmarks matter.
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Through August, the MSCI Emerging Markets Index returned to over 24% compared to 12.7% for the FTSE Emerging Index.
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The main reason is South Korea represents 20 percent, 20.85% of the MSCI Emerging Markets Index, but it's not included in the FTSE Emerging Market Index.
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That different also changes the sector mix technology over 40% in the MSCI Index versus over 31% for the FTSE Index.
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The country weights of China, Taiwan, and India also differ meaningfully.
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Even valuation comparisons are affected.
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The MSCI index as a trailing PE less than 12 compared with 15 for the FTSE index.
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The practical take away is that 2 funds labeled emerging markets can produce very different results because they may own different countries, sectors, and companies.
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Benchmark selection and investment decision, not in administrative detail.
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Moving on to bond fund flows and future market performance, investor behavior remains much more cautious than the stock market performance might select.
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Over the last 12 months, bond funds, both bond fund mutual funds and ETFs, took in more than $466 billion more than stock funds.
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The chart on the left shows that this is a large gap, although not unprecedented.
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The chart on the right asks that what happened after similar extremes.
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When bond funds flows exceeded stock fund flows by more than $200 billion, U.S.
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stock returned on average 19.1% over the following year, while US bonds returned only two point O 7%.
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When stock fund flows led by more than $200 billion, stocks returned only 5.33% and bonds returned earned 5.58% on average.
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This is not a market timing signal and and the current outcome may differ, but historically heavy demand for bonds has often reflected caution rather than an end to an equity advance.
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Strong bond flows can coexist with favorable subsequent stock returns.
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Building on that, looking at money fund flows, slowing the composition of defensive flows is also changing.
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Money market funds received $1.149 trillion in 2020, three $949 billion in 2020, four 886 billion in 2025, but nog in 2026.
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Through August, that figure is only 213 billion.
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Bond funds, by contrast, received $575 billion through July of 2026.
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The annualized pay shows here is about 320 billion for money funds and 986 billion for bond funds.
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One possible driver is a change in the Treasury curve.
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At the end of 2023, the three months Treasury yield yielded around 5.4%, well above the 10 year Treasury yield of 3.88%.
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By August of 2026, that relationship has reversed.
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The 10 year Treasury yielded 4.75% and the three month Treasury yielded 3.91.
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As longer term yields become more competitive, investors had more incentive to consider bonds rather than remain entirely in cash.
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The relationship is historical and correlated, not necessarily casual.
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The fixed income challenge has not simply been the level of rates, it's also been the size and frequency of of the swing.
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Since the 10 year Treasury first moved past 4% in October 2022, yields have repeatedly moved between roughly the low 3% range and the high 4% range.
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This table shows how different bond approaches perform during each move.
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In the rising rate period from April to October 2023, core bonds lost 7.29% while multi sector bonds lost only 2.12% and non traditional bonds gained 0.22%.
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The latest period from October 2025 through August 2026, multi sector and non traditional bonds gained 2.28% and 2.18%, while the core bond index declined to 0.54%.
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Across the full.
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Annualized returns were 6.91% for multi sector bonds, 5.73% for non traditional bonds and 4.71% for core bonds and 4.22% for money market funds.
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Although active strategies carry their own risk and outcomes can vary, flexibility has historically been rewarded.
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Active flexible fixed income strategies have outperformed the index across the entire period examined.
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Let's finish with the diversification challenge that has changed in the current decade.
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From 2020 through August 2026, the maximum drawdown was 23.87 for U.S.
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stocks and 17.18% for US bonds.
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At the same time, the correlation between stocks and bonds rose to 0.51, meaning bonds provided less diversification than investors experienced the prior 2 decades.
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The equity market neutral category shown here had a maximum drawdown of 5.2%, volatility of 3.25, and stock correlation of 0.02 over that same.
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The combination illustrates the potential value of a return stream that is less dependent on the direction of traditional markets.
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This this slide uses equity market neutral as one example, not as a proxy for every alternative strategy.
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The broader take away is that when stock and bond diversification is less reliable, carefully selected alternatives may help manage drawdowns and portfolio risk.
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In summary, in closing, this month's BlackRock Student of the Market shows that strong markets can coexist with cautious investing positioning.
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U.S. stocks have entered September with strong momentum.
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Today's technology rally remains more measuredthanthe.com bubble and defensive flows are shifting from cash towards bonds as longer term yields become more competitive.
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The takeaways?
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To remain invested, selective and diversified, investors should look beyond short term season, understand the exposures behind their investment, consider flexibility within fixed income, and evaluate alternatives where appropriate.
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The goal is not to predict the next market move, but to build a portfolio that can seed across a range of outcomes.
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Thanks for listening.
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We'll see you next month on Blackrock's Student of the Market.
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