Goldman Sachs, JPMorgan and Morgan Stanley dominate the AI stock boom in equities trading

The three banks have captured about 80% of a record $67B equities trading market in 2026 so far. Prime brokerage lending to hedge funds is a major driver, and the IMF has warned about crowded positions.

What happened

Goldman Sachs, JPMorgan Chase and Morgan Stanley have captured about 80% of a record $67B equities trading market in 2026 so far, according to an October 21 report. [1] The report ties the dominance to demand for AI stocks, relaxed regulatory capital rules and aggressive margin lending to hedge funds. [1]

Prime brokerage, which is leveraged lending to hedge funds, has changed from a cyclical business into a high-margin engine. [1] Goldman's equities financing jumped 96% in the third quarter. [1] The same report lists several systemic risks: record leverage, concentrated client bases and IMF warnings that crowded positions could cause instability. [1]

How we got here

The share gains build on a run of results and deals this year. On June 3, Alphabet announced an $80 billion equity offering to fund AI infrastructure, with $10 billion going to Berkshire Hathaway. [2] Goldman Sachs, JPMorgan Chase and Morgan Stanley were joint book-runners. [2] Goldman's co-CEO described the issuance as "unprecedented territory". [2] The deal pointed to heavy demand for AI computing capacity and strong appetite for large tech equity raises, though its size raised questions about execution and market absorption. [2]

On July 14, Goldman Sachs and JPMorgan Chase reported record quarterly revenue. [3] Goldman's revenue rose 39% to $20.3 billion, and JPMorgan's rose 27% to $58 billion. [3] Equities trading and investment banking drove the increases. [3] Executives said AI was present across financial markets, including IPOs, index rebalancing and activity in Asia. [3] Goldman CEO David Solomon described an early-stage AI capital-spending super cycle expected to last three to five years. [3] He said it was creating financing demand across instruments, regions and industries. [3] Both banks' shares rose sharply in afternoon trading that day. [3]

Morgan Stanley followed on October 14 with third-quarter results that beat consensus on earnings per share and total revenue. [4] Equities trading revenue rose 41% to $5.8 billion, about $909 million above StreetAccount expectations, and Asia stood out as a region. [4] Fixed income trading and investment banking fell short of expectations. [4] Premarket shares dipped slightly as analysts focused on CEO Ted Pick's outlook for M&A and IPOs in a higher-rate environment. [4]

The October 21 report therefore adds the concentration figure and the financing angle to a pattern already visible in the quarterly results: equities trading, not the other business lines, supplied most of the upside. [1][4]

The backdrop has not been calm. On January 12, President Trump called for a one-year 10% cap on credit card interest rates, and bank and card-related shares fell sharply. [5] On January 13, JPMorgan CFO Jeremy Barnum said the industry could fight the demand, with litigation among the options. [6] In early March, the Middle East conflict disrupted LNG flows through the Strait of Hormuz, and Qatar ceased LNG production after drone strikes. [7][8] By September the conflict had entered its seventh month, with Brent crude stabilizing around $80-100/barrel. [9] On October 13 the IMF said advanced AI-integrated economies, including the US, Taiwan and South Korea, were insulated from the energy shock, while vulnerable oil-importing countries faced debt and spending strain. [10]

Why it matters for markets

The concentration of trading and financing in three banks could make their results a gauge of AI-linked market activity. Their revenue has risen with equities trading and investment banking tied to the AI theme. [3][4] If the AI capital-spending cycle continues as Solomon described, financing demand across instruments and regions could keep supporting that activity. [3]

The same structure could also amplify stress. Prime brokerage earnings depend on leveraged hedge fund clients, and the report points to record leverage and a concentrated client base. [1] The IMF's warning about crowded positions suggests that a sharp reversal in AI-related holdings could spread through the lenders that finance them. [1] Whether that would happen is not yet known.

Household behavior is another channel. JPMorgan Chase Institute analysis found that 8.2% of individuals transferred money from investments to checking in the three months through April 2026, up from 4% in 2019. [11] Those flows equaled 6.8% of checking-account spending. [11] Researchers linked the pattern to larger household equity wealth and the wealth effect. [11] If equity prices fell, that spending support could weaken, though that is an inference and not something shown to be happening now.

The IMF's description of uneven growth, with AI-integrated economies insulated from the energy shock, is consistent with the AI theme carrying markets. [10] It also means the boom coexists with the war-driven stress that the IMF describes elsewhere. [10]

What to watch

• Whether equities financing growth, such as Goldman's 96% jump in the third quarter, continues in later quarters, and whether the relaxed capital rules change. [1]
• Further IMF commentary on leverage and crowded positions. [1]
• Whether Morgan Stanley's M&A and IPO outlook improves in a higher-rate environment, given that fixed income and investment banking undershot expectations. [4]
• Further large equity raises, after Alphabet's $80 billion offering tested market absorption. [2]
• Whether China resumes oil purchases at its pre-war pace, since the Strait of Hormuz closure is still choking off approximately 20% of world energy supply and Goldman has warned of prices reaching $120/barrel. [9]
• Any renewed push on the credit card interest cap, which JPMorgan said the industry could contest. [5][6]

Sources

1. US Top News and Analysis: Goldman Sachs, JPMorgan and Morgan Stanley are dominating the AI stock boom. Here's their edge, 21 Oct 2026
2. US Top News and Analysis: Alphabet's $80 billion stock sale leaves Wall Street in 'unprecedented territory,' says Goldman's Gutman, 03 Jun 2026
3. US Top News and Analysis: The AI boom just found two new winners: Goldman Sachs and JPMorgan Chase, 14 Jul 2026
4. US Top News and Analysis: Morgan Stanley tops estimates as equities trading revenue exceeds expectations by $909 million, 14 Oct 2026
5. US Top News and Analysis: Capital One drops 10%, other banks hit after Trump calls for credit card rate cap; Affirm gains, 12 Jan 2026
6. US Top News and Analysis: JPMorgan Chase says banks could fight Trump credit card rate cap: 'Everything's on the table', 13 Jan 2026
7. Oilprice.com: Goldman: Asian and European LNG Prices Could Jump 130%, 02 Mar 2026
8. Oilprice.com: Global Gas Markets Shocked as Qatar Ceases LNG Production, 02 Mar 2026
9. US Top News and Analysis: 'Saved the day': How China helped keep the lid on oil price surge as Iran war disrupted supplies, 10 Sep 2026
10. World News: Latest International News & Updates | The Hindu: No choice: IMF says developing countries must cut spending despite war shock, 13 Oct 2026
11. US Top News and Analysis: More Americans are tapping investments to pay for spending, analysis finds, 30 Sep 2026

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Provenance

• Study: event-desk-20261023-goldman-sachs-jpmorgan-and-morgan-stanley-dominate-the-ai-st (5539aa89-db9c-4657-ba66-6a637a12ea15)
• Author: FinUties Research
• Approved by: FinUties Research at 2026-10-23T12:43:48.512083Z
• Kind: event brief (news sources, not a FinUties dataset study)
• Cited sources: 11 from 3 outlets, all licensed for public use

• Earlier related events cited from 2026-01-12

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