Investors Borrowed $1.45 Trillion to Buy Stocks. Is the Market One Correction Away From a Margin-Call Avalanche?

Rich Duprey

Sat, September 19, 2026 at 6:54 PM GMT+3 5 min read

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Quick Read

Margin debt hit $1.45 trillion in August, up 140% since 2022 and outpacing the S&P 500's 98% gain, which leaves the market carrying far more forced-selling risk.
At roughly 4.5% of GDP, margin debt now exceeds the dot-com bubble's peak, meaning a routine correction could cascade into broker-forced liquidations across the market.
The real danger isn't high leverage itself but the simultaneous forced selling that erupts when overleveraged investors all need cash at once.
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Stock-market gains can make leverage look harmless. When portfolios rise, borrowed money magnifies returns, and the debt itself can disappear into the background. That changes when prices turn lower. A margin loan does not care whether a decline is temporary or the beginning of a bear market. If account equity falls below required levels, brokers can demand more collateral or sell securities to bring the account back into compliance.

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The Financial Industry Regulatory Authority's (FINRA) latest margin data show that investors have accumulated an unusually large amount of borrowed money while stocks have also climbed sharply. That makes the next correction more important than the last one.

Margin Debt Has Exploded

According to FINRA's monthly Margin Statistics, U.S. margin debt increased by about $37 billion in August to $1.45 trillion, the second-highest reading on record behind June's $1.50 trillion. The August balance was up $228 billion, or 19%, from the start of 2026.

The longer-term comparison is even more striking. Since the end of 2022 -- and the start of the current AI-dominated era -- investor borrowing has increased by $847 billion, or 140%, versus a 98% gain for the S&P 500 over the same period. That means leverage has grown faster than the market value investors have accumulated, presumably as they took on debt to buy into the AI boom.

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Margin debt also has reached an unusual level relative to the economy. Research using FINRA margin data puts margin debt at roughly 4.5% of U.S. GDP, above the approximately 3.6% peak associated with 2021 and the 2.8% level around the 2000 dot-com bubble.

That doesn't mean we could see another 2000 or 2008, but it does mean there is more leverage sitting underneath today's stock prices.

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Leverage is at an all-time high, outpacing even the Dot-Com bubble. One market slip could trigger a devastating feedback loop of forced liquidations. © 24/7 Wall St.

Why a Correction Could Become Self-Reinforcing

An investor using margin owns securities partly with borrowed money. If those securities decline, the investor's equity shrinks. Once equity falls below the broker's maintenance requirement, the investor may have to add cash or securities. If that doesn't happen, the broker can sell securities -- potentially without waiting for the investor's permission. FINRA says firms can also impose higher "house" requirements.

That creates a negative feedback loop where selling puts more pressure on stocks.

Of course, not every dollar of the $1.45 trillion will suddenly hit the market at the same time. Most margin accounts have equity cushions, and investors can meet calls with cash or other securities. The SEC also notes that margin accounts can magnify both gains and losses.

Still, the size of the borrowing means the market has more potential for forced selling than it did a few years ago.

It's Not Just the $1.45 Trillion That Is Worrisome

The raw dollar figure isn't enough to determine whether stocks are about to crash. The U.S. economy and stock market are both much larger than they were in 2000.

The more revealing -- and concerning -- statistic is how quickly leverage has expanded relative to stocks. Since 2022, margin debt has risen 140%, compared with the near doubling of the S&P 500. And margin debt at roughly 4.5% of GDP now exceeds previous cycle peaks in the 2000 and 2021 periods.

It says the market is much more fragile now, not that a crash is imminent. A market correction could just remain an ordinary 10% decline -- or leverage could amplify it through forced selling. The FINRA numbers are indicating the second possibility deserves more attention than it did when investors had hundreds of billions less riding on borrowed money.

Key Takeaway

Investors shouldn't sell stocks simply because margin debt is high. History does not provide a reliable rule saying a particular leverage level automatically produces a crash. But the $1.45 trillion balance, 140% increase since the end of 2022, and a roughly 4.5% of GDP ratio show that leverage has now become an important risk variable that needs to be taken into account.

For long-term investors, the practical response is straightforward: avoid using excessive margin (good advice for anyone), maintain enough cash to withstand a sharp drawdown, and don't assume today's gains will protect your portfolio tomorrow. Ultimately, the danger isn't that margin debt is high, but rather what happens when highly leveraged investors all discover they need to sell at the same time.

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