Equities
Updated
Summary
Equities are shares in listed companies. In this graph the node stands for the global stock market, tracked through benchmarks such as the S&P 500, the Nasdaq Composite and the Nikkei 225. The U.S. market alone had $83.1 trillion of public equities outstanding at the end of 2025, per the Fed. Prices move with corporate earnings, interest rates and financial conditions; index rules can also shape what index-tracking funds hold, though how much that moves prices depends on mandates and implementation (AA inference). The S&P 500 ended September 2026 at about 7,652, with a 12.75% total return for the year to date.
Key numbers
S&P 500 index level (month-end): 7,652 (as of 2026-09-30). Source: spglobal.com
S&P 500 vs S&P 500 Equal Weight, total return year to date: 12.75% vs 10.03% (as of 2026-09-30). Source: spglobal.com
S&P 500 Information Technology sector, total return year to date: 28.38% (as of 2026-09-30). Source: spglobal.com
Nikkei 225 close: 65,324.29 (as of 2026-10-16). Source: indexes.nikkei.co.jp
VIX, September month-end close: 16.34 (as of 2026-09-30). Source: spglobal.com
Federal funds target range: 3.75%-4.00% (as of 2026-09-16). Source: federalreserve.gov
U.S. public equities outstanding (Fed FSR, Table 1.1): $83.1 trillion (as of 2025-12-31). Source: federalreserve.gov
TSMC third-quarter 2026 revenue (reported): US$46.72 billion, +41.2% y/y (as of 2026-09-30). Source: pr.tsmc.com
NVIDIA second-quarter fiscal 2027 revenue (reported): $96.2 billion, +106% y/y (as of 2026-08-26). Source: nvidianews.nvidia.com
NVIDIA third-quarter fiscal 2027 revenue guidance (company guidance, not a result): $108.0 billion ±2% (as of 2026-08-26). Source: nvidianews.nvidia.com
U.S. leveraged single-stock ETF assets (BIS): above $190 billion (as of 2026-09-03). Source: bis.org
Timeline
2026-10-16 — The Nikkei 225 closes at 65,324.29, up 1.39%, with technology the largest contributor. (Source: indexes.nikkei.co.jp)
2026-10-15 — MSCI announces a consultation on Indonesia's market classification. (Source: msci.com)
2026-10-15 — TSMC reports third-quarter revenue of US$46.72 billion, up 41.2%, and guides fourth-quarter revenue to US$52.3-54.3 billion (guidance). (Source: pr.tsmc.com)
2026-10-14 — ASML reports EUR 11.7 billion of quarterly sales and says planned 2027-28 supply will fall short of demand. (Source: investor.asml.com)
2026-10-13 — The IMF warns that faltering AI investment or profits could trigger a correction in AI-linked assets. (Source: imf.org)
2026-09-30 — The S&P 500 ends September at about 7,652, up 12.75% year to date in total-return terms; technology is up 28.38%. (Source: spglobal.com)
2026-09-16 — The FOMC raises the federal funds target range by a quarter point to 3.75-4%, citing elevated inflation. (Source: federalreserve.gov)
2026-09-14 — The BIS reports chip-maker P/E ratios down up to 40% over the summer. (Source: bis.org)
2026-08-26 — NVIDIA reports quarterly revenue of $96.2 billion, up 106%, and guides the next quarter to $108.0 billion plus or minus 2% (guidance). (Source: nvidianews.nvidia.com)
2025-12-31 — The S&P 500 ends 2025 with a market value of $58.438 trillion, up $8.633 trillion on the year. (Source: spglobal.com)
Key actors and links
S&P 500 (asset:index-spx): Main U.S. benchmark; about 7,652 at 2026-09-30, up 12.75% this year.
Nasdaq (asset:index-ixic): Tech-heavy U.S. benchmark; its 2026-10-16 level is UNKNOWN here (provider figures did not reconcile).
Nikkei (asset:index-n225): Japan's benchmark; closed at 65,324.29 on 2026-10-16, with technology the largest contributor.
Nasdaq/S&P/Nikkei drawdowns (indicator:equity-index-drawdowns): Measures this node; the IMF's October 2026 AI-linked correction scenario is the risk it would register.
AI productivity (theme:ai-productivity): AI earnings lead 2026 gains; the IMF names faltering AI investment or profits as a correction risk (scenario).
Financial conditions (theme:financial-conditions): Fed minutes call conditions supportive with stocks up; the Fed is now hiking.
US-China AI (theme:us-china-ai-competition): Existing graph edge; chip policy shapes earnings of the index leaders.
Federal Reserve (actor:federal-reserve): Raised rates to 3.75-4% on 2026-09-16; sees the equity premium near a 20-year low.
International Monetary Fund (actor:imf): October GFSR blog flags AI-linked correction risk and circular AI financing.
BIS (actor:bis): Found chip P/Es down up to 40% and non-tech S&P 500 valuations near 2000 peaks.
NVIDIA (asset:stock-nvda): Its revenue rose 106% in its latest reported quarter; it guided the next to $108.0 billion ±2% (guidance).
Corporate earnings (indicator:corporate-earnings): The Fed attributes 2026's equity gains to earnings, not multiples.
Indonesia (country:indonesia): MSCI announced a consultation on its market classification on 2026-10-15; outcome and any flow effect UNKNOWN.
Why it matters now
Earnings carry the 2026 market, and AI drives the earnings that lead it. Fed staff, in the September FOMC minutes, attribute this year's equity gains entirely to earnings, with price-to-earnings multiples lower, and say companies directly benefiting from AI infrastructure investment outperformed. Leadership is narrow: S&P 500 technology returned 28.38% to 2026-09-30, against 12.75% for the S&P 500 and 10.03% for its equal-weight version. Reported results back this up: TSMC revenue +41.2%, NVIDIA +106%. Forward-looking statements are company outlooks, not results: TSMC guided its fourth quarter to US$52.3-54.3 billion, NVIDIA guided its next quarter to $108.0 billion plus or minus 2%, and ASML says its planned 2027-28 supply will not fully meet AI-driven demand.
The pressure points are rates and valuation. The Fed raised rates to 3.75-4% on 2026-09-16 with inflation elevated. The Fed's May 2026 Financial Stability Report put the S&P 500 forward P/E well above its historical median and the equity premium near a 20-year low as of April; the BIS (September 2026) sees S&P 500 valuations outside tech near January 2000 peaks. The IMF's October 2026 assessment is a risk scenario, not a forecast: faltering AI investment or profits, or higher yields, could trigger a correction in AI-linked assets. The Nasdaq Composite's 2026-10-16 level is UNKNOWN in this pass because the provider page's figures did not reconcile.
Risks and open questions
Bull case: The rally rests on profits. Fed staff attribute 2026 gains to earnings with lower multiples, and the BIS says hyperscaler valuations look more moderate by historical standards. Reported results are strong (TSMC revenue +41.2%, NVIDIA +106%), and company outlooks still point up: TSMC guided a higher fourth quarter, NVIDIA guided $108.0 billion ±2% of quarterly revenue, and ASML says planned 2027-28 supply will not meet demand. These are outlooks, not results. The VIX ended September at 16.34.
Bear case: Leadership is narrow: technology returned 28.38% to 2026-09-30 while the equal-weight S&P 500 returned 10.03%. The Fed is hiking with inflation elevated, and its May report put the equity premium near a 20-year low. The IMF counts about $950 billion (AA sum) of circular AI equity and debt against $1.4 trillion of revenue commitments and describes an AI-linked correction as a risk scenario. BIS data show leveraged single-stock ETFs above $190 billion, which the BIS estimates can amplify moves.
Falsifiers: - Bull weakens if Alphabet cuts AI spending plans on 2026-10-28 or NVIDIA reports below the low end of its $108.0 billion ±2% guidance (about $105.8 billion, AA arithmetic). - Bull weakens if the FOMC hikes again on 2026-10-28 or 2026-12-09 and equity prices fall as yields rise. - Bull weakens if the IMF's AI-linked correction scenario materialises, for example through falling AI capex guidance at the major chip suppliers. - Bear weakens if earnings keep rising while multiples fall. - Bear weakens if the equal-weight S&P 500 keeps pace with technology.
What to watch
FOMC decision after the September hike; watch for another move and any comment on asset prices. (2026-10-28); Source: federalreserve.gov
Alphabet third-quarter results: AI capex and cloud growth. (2026-10-28); Source: abc.xyz
NVIDIA third-quarter fiscal 2027 results against its $108.0 billion ±2% revenue guidance. (late November 2026; date not confirmed in this pass); Source: nvidianews.nvidia.com
FOMC December decision with new economic projections. (2026-12-09); Source: federalreserve.gov
ASML fourth-quarter sales against its EUR 14.2-15.2 billion guidance, and its 2027 outlook. (January 2027; date not confirmed in this pass); Source: investor.asml.com
Whether chip-stock P/E compression spreads to the rest of the S&P 500. (no scheduled date); speculative, no scheduled source
Outcome of MSCI's Indonesia market-classification consultation and any index-eligibility changes; not restated here (MSCI material on hold), flow effects UNKNOWN. (no scheduled date restated); speculative, no scheduled source
AA inference
Inference (AA): This node is where AI spending, monetary policy and index construction meet holder wealth. AA reads the chain as: AI capex becomes revenue at TSMC, ASML and NVIDIA, lifting index earnings and cap-weighted benchmarks, and concentrating cap-weighted portfolios in a few names. Rates act through the discount rate and financing costs. Index-rule changes can act through index-tracking funds, but only conditionally: the realized flow depends on fund mandates, implementation choices and timing, which no source here measures. With gains earnings-led, the main risk is an earnings or capex miss against guidance, not valuation alone. The thesis weakens if returns broaden away from AI while AI earnings slow without a market fall.
Sources
S&P DJI's U.S. index dashboard (as of 2026-09-30) shows the S&P 500 at 7652 with a 12.75% total return year to date; the S&P 500 Equal Weight Index returned 10.03% year to date. (Source: spglobal.com, accessed 2026-10-16)
On the same dashboard, the S&P 500 Information Technology sector's total return year to date to 2026-09-30 was 28.38%. (Source: spglobal.com, accessed 2026-10-16)
S&P DJI's dispersion dashboard reports the VIX closed September 2026 at 16.34, with implied dispersion (DSPX) at 36.25. (Source: spglobal.com, accessed 2026-10-16)
S&P DJI reported the S&P 500 closed 2025 with a market value of USD 58.438 trillion, having added USD 8.633 trillion during the year, excluding USD 671 billion of dividends. (Source: spglobal.com, accessed 2026-10-16)
The Nikkei 225 closed at 65,324.29 on 2026-10-16, up 898.34 points (1.39%), with technology the largest contributor. (Source: indexes.nikkei.co.jp, accessed 2026-10-16)
On 2026-09-16 the FOMC voted 12-0 to raise the federal funds target range by 1/4 percentage point to 3-3/4 to 4 percent, saying inflation remains elevated and uncertainty is elevated, partly due to geopolitical developments. (Source: federalreserve.gov, accessed 2026-10-16)
Minutes of the 2026-09-15/16 FOMC meeting say the rise in equity prices this year was entirely attributable to strong actual and expected corporate earnings while price-to-earnings multiples had declined, and that companies directly benefiting from AI infrastructure investment outperformed the rest of the market. (Source: federalreserve.gov, accessed 2026-10-16)
The same minutes say financial conditions appeared supportive of growth with equity prices up substantially this year, and that stock market gains had supported consumer spending, particularly among higher-income households. (Source: federalreserve.gov, accessed 2026-10-16)
The Federal Reserve's calendar lists remaining 2026 FOMC meetings on October 27-28 and December 8-9, with a Summary of Economic Projections in December. (Source: federalreserve.gov, accessed 2026-10-16)
The Fed's May 2026 Financial Stability Report says the S&P 500 forward price-to-earnings ratio remained well above its historical median and that an estimate of the equity premium remained near a 20-year low as of April 2026. (Source: federalreserve.gov, accessed 2026-10-16)
The same report puts U.S. public equities outstanding at $83,097 billion at 2025:Q4, up 17.6% from a year earlier. (Source: federalreserve.gov, accessed 2026-10-16)
An IMF blog on the October 2026 Global Financial Stability Report says AI has become an important support for markets and that faltering AI investment and profitability could trigger a correction in AI-linked asset prices. (Source: imf.org, accessed 2026-10-16)
The IMF blog says a review of 14 circular AI financing deals since 2023 found about $300 billion of equity and $650 billion of debt against $1.4 trillion of future revenue commitments, and that higher sovereign yields could depress valuations through higher discount rates. (Source: imf.org, accessed 2026-10-16)
The BIS Quarterly Review of 2026-09-14 (covering 2026-06-01 to 2026-09-03) says AI-led momentum in global equities wobbled, IT-sector P/E ratios fell by between nearly 15% for hyperscalers and 40% for semiconductor manufacturers, and valuations elsewhere in the S&P 500 edged close to their January 2000 peaks, while hyperscaler valuations now look more moderate by historical standards. (Source: bis.org, accessed 2026-10-16)
The same BIS review says U.S. leveraged single-stock ETF assets exceeded $190 billion in 2026 and estimates that fund rebalancing flows could add roughly 2-4 percentage points to a 10% move in Korean memory-chip stocks. (Source: bis.org, accessed 2026-10-16)
MSCI announced a consultation on Indonesia's market classification on 2026-10-15. (Source: msci.com, accessed 2026-10-16)
TSMC reported third-quarter 2026 revenue of US$46.72 billion, up 41.2% year over year in US dollars, net income of NT$763.06 billion (up 68.7%) and a 66.4% gross margin, and guided fourth-quarter revenue to US$52.3-54.3 billion. (Source: pr.tsmc.com, accessed 2026-10-16)
ASML reported third-quarter 2026 net sales of EUR 11.7 billion and net income of EUR 5.0 billion, guided 2026 sales to EUR 44-45 billion, and said its supply as currently planned for 2027 and 2028 will not fully meet customer demand, which it ties primarily to AI-related investment. (Source: investor.asml.com, accessed 2026-10-16)
NVIDIA reported second-quarter fiscal 2027 revenue of $96.2 billion on 2026-08-26, up 106% year over year, with Data Center revenue of $89.0 billion, and guided third-quarter revenue to $108.0 billion plus or minus 2%. (Source: nvidianews.nvidia.com, accessed 2026-10-16)
Alphabet will hold its third-quarter 2026 results call on 2026-10-28. (Source: abc.xyz, accessed 2026-10-16)