The SEC is conducting widespread requests for information from private credit firms, and if you're thinking "what's private credit and why should I care?" you're not alone. Most retail investors have no idea this $1.7 trillion shadow banking system even exists. Let me explain why you should pay attention.

Private credit is basically loans made outside the traditional banking system. Instead of companies going to JPMorgan or Bank of America for a loan, they borrow from private equity firms, hedge funds, and other institutional investors. This market has exploded since the 2008 financial crisis because banks got regulated, but private lenders didn't.

The SEC is now asking tough questions about valuations, loan selection practices, and risk management. Translation: they're worried that private credit firms are playing fast and loose with their books. When you can't trade these loans on a public market, how do you know what they're really worth? Answer: you don't. The firms just mark them at whatever value they feel like.

So why should you, a regular investor, care about what some hedge funds are doing with their money? Two reasons. First, your pension fund is probably invested in private credit. State pension funds, university endowments, and even some 401(k) target-date funds have exposure to this stuff. If there's a blowup, it's not just rich people who get hurt.

Second, this is exactly the kind of thing that looked fine until it didn't. Remember 2008? Everyone said subprime mortgages were "contained" and posed no systemic risk. Then Lehman Brothers collapsed and suddenly we're all learning what a collateralized debt obligation is. Private credit has the same ingredients: opaque valuations, high leverage, and a lot of people who claim it's "different this time."

The good news is the SEC is finally looking. The bad news is they're looking because something probably already smells wrong. According to the Wall Street Journal, regulators are specifically concerned about how these firms value distressed loans and whether they're hiding losses.

You can't directly invest in private credit as a retail investor—you're not rich enough, and that's actually a blessing. But if you hold a pension or a target-date fund, you might want to check what percentage is allocated to "alternative investments" or "private markets." If it's more than 10%, you have exposure. And if this market implodes, you'll feel it.

If they can't explain how they value these loans simply, they're probably hiding something.