Gina Francolla is the Senior Producer of Quantitative & Market Data Services at CNBC.
More than 275 components in the broad index were down at least 10 percent from their 52-week highs as of 11:04 a.m. ET.
Stocks have done extremely well since the financial crisis ended, but GGP has left everyone in the dust.
A well-placed bet on Amazon at the market's bottom of the financial crisis would've made investors lots of money.
A diverse group of S&P 500 companies have already made it back to or near near their January high.
After Friday's open, 367 S&P 500 companies — or 73 percent — are at or beyond correction level.
There are 339 companies in the S&P at correction levels or better, 82 of those at bear market levels.
Stocks hit a rut this week after coming out of the gates strong in 2018.
Fed Chair Janet Yellen leaves her post after four years, and during that time it was smooth sailing for stocks, with tech shares doubling.
U.S. stocks closed lower Friday, the last trading day of the year, with no S&P 500 sectors ending higher.
The U.S. dollar weakened after the Federal Reserve hiked interest rates, but left its rate outlook for the coming years unchanged.