Larry Kudlow
Are Ben Bernanke's loose lips the real cause of surging stocks and plunging interest rates?

Here's the backstory: The so-called smart money on Wall Street had it all wrong. "Sell in May, and go away" was the big theme a month ago. Oops. The broad-based S&P 500 has jumped another 2.5 percent to a record high near 1920. Meanwhile, 10-year Treasury rates unexpectedly dropped to less than 2.5 percent. So if the Wall Street pros are honest, they'll admit they've been selling stocks and bonds, not buying them, and therefore got the story all wrong.

And perhaps most surprisingly, the so-called "real" or inflation-protected 10-year TIPS yield also dropped another 25 basis points. Year to date, this key proxy for real economic growth has unexpectedly fallen 56 basis points to a low 0.2 percent. This is an election-year economic warning for Democrats.

But in effect, we're looking at 1950s-style interest rates. And we may be looking at this for a long time. Presuming corporate profits continue to rise around 5 or 6 percent, this low-interest-rate scenario is very bullish for stocks.

Now let's turn back to Bernanke and his loose lips. He may have been the catalyst for the recent market rally.

Beginning in late March, roughly two months after his Fed chairmanship ended, Bernanke gave several high-priced private-dinner talks for major hedge-fund players and banks. Should he have done it? Well, there's nothing illegal about it. And he did observe a two-month cooling-off period after leaving the Fed. And he's certainly no lobbyist, so there are no conflicts of interest.

But when he told at least one dinner audience that the Fed's key target fed funds rate would not rise to its long-term average of around 4 percent, he made big news. In fact, he made shock-effect news. So far as I know, new Fed chair Janet Yellen has never been this specific. But people believe Bernanke is tied to Yellen's hip. So his forecast of abnormally low rates is very important.

It suggests easy money as far as the eye can see. It also indicates that the Fed may not truly tighten monetary policy in my lifetime.

On top of all that, Bernanke strongly hinted that, if necessary, the Fed may well overshoot its 2 percent inflation target. This too is big news.

Clearly, the ex-Fed chief let the big-money high-rollers in on a very bullish, ultra-easy-money scenario. But word eventually trickled out, and markets jumped all over it. That's one reason why stocks have been rallying despite a 1 percent contraction of first-quarter GDP.


Larry Kudlow

Lawrence Kudlow is host of CNBC’s “The Kudlow Report,” which airs nightly from 7 p.m. to 8 p.m.