The Dow plunged nearly 26 points in the last 25 minutes.

And, indeed, it plunged more than 49 points in the first 15 minutes.

When a backup was switched on, the average appeared to plunge 300 points in a matter of minutes.

It apparently did little when the stock market plunged 101 points on April 14.

The same day the stock market plunged 800 points.

Within an hour of the opening, the Dow plunged nearly 50 points.

And they could fold if the Dow plunged 1,000 points in one day.

And during that sale, the Dow plunged more than 100 points.

Since then it has plunged 15 percent, or almost 400 points.

By the end of the day, the Dow had plunged 44.31 points, to 2,440.84.