As far as the markets go, they’ve had an incredible run since 2009.

That’s because the Federal Reserve bought more than $4 trillion worth of bonds and securities in the open market to flatten interest rates and buoy said markets.

But going forward, starting in September, the Fed’s stopping its monthly purchases of billions of dollars’ worth of bonds… And that could send the markets into a tailspin.

Today, I’m covering what Fed Chair Janet Yellen said in her Humphrey-Hawkins testimony to Congress this week. More importantly, I’m covering what she didn’t say, and what could happen starting in September.

If you own stocks, you’re going to want to take this seriously…

How the Fed is Currently Propping Up Our Markets

The bottom line is that the Fed doesn’t have any capital to speak of. It buys bonds on made-up credit.

When it purchases bonds in the open market, from the big bank “primary dealers” it deals directly with, it pays them by issuing electronic credits. Banks and dealers use those credits to make loans or buy more bonds and securities themselves, which the Fed comes back to them to buy, again and again.

That’s how that game was played.

The direct winners in that game were, of course, the big banks who were crushed by the financial meltdown in 2008 and needed rescuing.

The secondary winners were the markets. With so much credit available to borrowers who wanted to buy stocks and to companies who wanted to buy back their own shares, the markets not only recovered, they went on a tear.

Not only did the Fed buy bonds banks couldn’t sell to other banks (because none of the big banks were technically solvent and were afraid if they sold bonds or securities to other banks they would never get paid), and not only did the Fed buy bonds and securities that were at the time almost worthless. The Fed lent banks money so they could buy more government bonds from the Treasury and in the open market, which the Fed would then buy from the banks.