How hedge funds help the U.S. borrow money, for better or worse : Planet Money : NPR

The U.S. government spends a ton of money, on everything from Medicare to roads to defense. In fact, it spends way more than it takes in. So…it borrows money, in the bond market. By selling U.S. Treasurys, basically IOUs with periodic interest payments. And for decades, people have loved to invest in Treasurys, for their safety and security.

But lately, Treasurys have started to look riskier.

In part because, in recent years, there's a new buyer at the table: hedge funds, those loosely-regulated financial companies that invest on behalf of institutions and wealthy clients. They have started doing a special trade called the "Treasury basis trade." And, depending on who you talk to, this trade could destabilize our entire financial system. Or help the U.S. government borrow more money. Or