Americans are borrowing against their portfolios faster than the market is going up, and margin debt is money investors borrow from brokers using securities as collateral to buy more securities. CNBC reporter Sean Conlon said margin debt hit a record $1.5 trillion in June 2026, up nearly 49% from a year earlier. Over the same period, the S&P returned about 21%, according to CNBC. Borrowing grew far faster than the market. FINRA releases monthly totals on its margin statistics page.
One of the people behind that number is Hy Luu. He is a 29-year-old investor in Houston who appeared in the segment. As of August 2026, he had borrowed roughly $147,000 on margin against $712,000 worth of Tesla (NASDAQ:TSLA | TSLA Price Prediction) shares. Those figures are from August, and we do not know what he holds now.
Hy Luu described the start: “I went really crazy. You know, interest rate was 2.5%, according to CNBC. Stock was going up. And so I was like, there’s no way I could lose. I need to buy more Tesla shares.”
Three Claims in the Segment Have No Named Source
Three statements in the CNBC segment come from unidentified speakers we could not independently verify. The first: “We have never seen Americans hooked on margin like this, according to CNBC. This is crazy.”
The second contains the segment’s main warning. CNBC reported that since 1960, whenever margin debt rose more than 45% year over year, the stock market declined five times out of six.
We could not verify this claim. Six cases across more than six decades is a small sample, but the pattern is striking and deserves attention.
What Tesla Stock Has Actually Done
Luu borrowed against Tesla because the stock was going up. As of 11:34 AM ET on October 9, 2026, Tesla traded at $381.15, up 1.64% Friday and up 7.64% over the past week.
For leveraged positions, longer periods matter more. Tesla shares are down 15.25% year to date and down 13.12% over the past twelve months. The borrowing case has not held up over the year.
How a Margin Call Can Force a Sale
When you borrow against shares, those shares become collateral. If their value falls far enough, the broker calls for more money or sells the position. The investor does not choose when that happens. That is what sets leverage apart from average investing: it can take away the option to wait for a recovery.
The segment notes that FINRA requires a minimum of 25% equity in a margin account, and brokerages often require more. To lower the risk of a margin call, Luu refinanced his home.
Brokerage Margin Books Have Grown Rapidly
CNBC data showed Robinhood Markets (NASDAQ:HOOD) margin book grew from $5 billion in the second quarter of 2024 to $21.6 billion in the second quarter of 2026. The speaker is unidentified and we could not verify the figures.
Borrowing to invest can take just a few taps in a trading app.
In His Own Words
Hy Luu summed up his approach this way: “It is gambling. What I’m doing is risky. I don’t recommend anyone do it.”
Luu describes his strategy more accurately than most. The record $1.5 trillion in margin debt is a figure to keep an eye on as FINRA releases its next monthly totals.