Boaz Weinstein lost his company $1 billion...
His punishment?
A promotion... and a brand-new hedge fund to run.
The year was 2007. Weinstein was one of the youngest managing directors in Deutsche Bank's history. And when it came to credit, he was one of the world's best traders, too.
His trade of choice was credit default swaps ("CDS")... a type of financial derivative that allows an investor to "swap" or offset their credit risk with another investor.
Essentially, it provides insurance against the risk of a default by a particular company or country.
Weinstein used CDS to make hundreds of millions of dollars for Deutsche in the early 2000s. He bet on the collapses of Enron and WorldCom, and that companies like General Motors would struggle.
And by 2007, he was ready for his most notable trade...
Weinstein noticed the housing market's instability before almost anyone else...
Lending standards were too loose. Unqualified buyers had flooded the market, taking out loans they'd never be able to pay back.
Home prices kept rising. The bubble was bound to burst eventually. And Weinstein wanted to profit from it. So he used his favorite tool at the time, CDS, to bet against the banks' favorite tool... mortgage-backed securities ("MBS").
Without getting too into the weeds, these MBS were full of junk bonds that were far too risky for any sensible investor to touch.
But when these junk bonds were grouped together as an MBS, they were said to be far safer... at least, according to the credit-ratings agencies.
Investors took the rating agencies' word as truth. Few people ever decided to look at the bonds that made up these "safe" securities.
Weinstein knew better. He realized the MBS house of cards was about to collapse. So he purchased CDS, betting that the risky "BBB" rated MBS would fail.
But he didn't know when it would collapse. And while he waited, he was on the hook for interest on the loans he was betting against.
Weinstein needed to offset the cash he was burning while he waited for the risky securities to fail...
So he purchased safe corporate bonds that he thought were good as gold.
He planned on using the interest from these bonds to pay for the interest on the MBS he was shorting.
But when the time came for the housing bubble to burst, it wasn't just the risky MBS that defaulted... Defaults trickled all the way up to the safe bonds Weinstein invested in.
Prices for the bonds plummeted. Weinstein's trade rapidly turned upside down. When the dust settled, he had put a $1 billion hole in Deutsche Bank.
Weinstein's failed trade was just one of many messes for banks during the financial crisis. In all, banks lost more than $1 trillion between 2007 and 2009.
It didn't take long for them to move on. New regulations tightened lending standards. Investors were soon piling back in.
As for Weinstein, he was put in charge of his own hedge fund. Soon, he was back to making hundreds of millions of dollars.
But while banks (and Weinstein) swiftly recovered, not all industries enjoyed the same good fortune...
When the housing bubble burst, it crippled the homebuilding market. It has taken nearly two decades to bounce back completely. Investors are still wary of the hardest-hit players.
The U.S. is desperate for houses today. The housing supply is short by somewhere between 3.7 million and 5.5 million. But while that should have been a blessing, the economy has had other ideas...
A lot of folks wanted to buy houses in the wake of the pandemic. Just as homebuilders started ramping up construction, the market flipped. Interest rates peaked around 5.5% in 2023 and 2024. Everyone stopped buying.
Earnings for Lennar (LEN), one of the largest homebuilders in the country, are down more than 50% from its peak in 2022. Others have followed suit.
And the tide may finally be turning for the homebuilding industry...
Interest rates are much lower today... down to a target of just 3.5% to 3.75%. While Federal Reserve Chair Jerome Powell resisted the Trump administration's push for further cuts, we don't expect it to last.
His successor, incoming Chair Kevin Warsh, was chosen because he'll be aggressive with rate cuts.
Lower rates mean more buyers can qualify for mortgages. More buyers means builders can stop discounting as much as they have recently.
Said another way, homebuilders can start making money again. Keep a close eye on this space.
Regards,
Rob Spivey
May 20, 2026
