Nearly 20% of the S&P 500 is already in a bear market

• After Friday's open, 367 S&P 500 companies — or 73 percent — are at or beyond correction level.
• Of those, 90 companies — or 18 percent — are at bear-market levels or greater, down 20 percent or more from their most recent 52-week high.

A trader uses his phone outside the New York Stock Exchange (NYSE) in New York.

Brendan McDermid | Reuters

After Friday's open, 367 — or 73 percent — are at or beyond correction level, down 10 percent or more from their most recent 52-week high.

Of those, 90 companies — or 18 percent — are at bear-market levels or greater, down 20 percent or more from their most recent 52-week high.

Here are the companies currently in a correction or greater.