It’s time I tell you about the mysterious President’s Working Group on Financial Markets.

It is also known as the Plunge Protection Team, or the PPT to the true believers. And if the stock market continues its wacky ride, the Plunge Protection/Working Group is something that President Trump will want to become very familiar with.

Trump probably already knows about this, since he’s read my column for years, and I’ve written about this shadowy group many, many times.

Before you think I’ve gone loony, let me give you the background.

The President’s Working Group on Financial Markets was created by President Reagan in March 1988, when he signed Executive Order 12631.

If you are old enough, you will remember that the stock market nearly crashed in 1987, and it left investors stunned.

The Working Group had three jobs, all seemingly pretty vanilla.

It was to “identify and consider” the major issues surrounding the near-crash of ’87; “consult, as appropriate, with representatives of various exchanges, clearinghouses” and other Wall Street bodies; and — last — report to Reagan within 60 days and regularly afterwards on its progress and recommended changes.

In other words, it was to be a liaison between Wall Street and Washington to keep bad things from happening.

This committee would consist of the Treasury Secretary, Federal Reserve chair and the heads of the Securities & Exchange Commission and Commodity Futures Trading Commission.

In other words, it was a big yawn — until people (me included) started suspecting in the mid-’90s that this group was up to something much more interesting.

Last week’s market action — with the Dow Jones industrial average falling more than a thousand points — probably wasn’t enough to set the PPT into motion, even if our suspicions are correct.

But the problems caused by the Great Recession and potential bank failures would have been enough to trigger intervention. Has anyone proved that the President’s Working Group actually dons a cape and like Superman comes to the rescue of the financial markets with a big PPT on its chest?

Nope, and they probably will never prove it definitively.

I probably came closest to finding this legend was true when I got hold of Treasury documents from the Great Recession showing Treasury Secretary Hank Paulson conferring by telephone regularly during the darkest days of the 2007-09 stock market with his pals on Wall Street before stocks suddenly came back to life.

So just remember that if the stock market’s current volatility continues, there is this thing called the PPT that many believe will jump into action — just as many think it has before.

If that time comes, the idea that America’s financial markets need to be free of interference will quickly be abandoned as Trump blows the whistle and the Plunge Protectors come running.

This is just something to think about.