The market’s horrible week, in numbers

How to trade the market's volatility
How to trade the market's volatility

The stock market has suffered a truly horrendous first week of trading. Just how bad was it?

Let's go to the numbers.


6: The number of percentage points that the S&P 500 Index fell over the past week. That's the worst one-week decline for the markets since the week ending August 5, 2011.

109: The number of years—at least—since U.S. stocks have suffered a worse opening. This was the worst year-starting five trading sessions ever in the history of both the S&P 500 and the older Dow Jones Industrial Average. (The latter was created in the middle of 1896, making 2016 the 110th year it opened).

110: In the past week of trading, this is how many stocks in the S&P 500 hit the lowest levels they have seen in the past year.

18: The number of stocks in the S&P 500 that rose 1 percent or more in the past week. The biggest winner was Time Warner, which jumped 10 percent on deal talk.

1: The number of stocks in the Dow that rose in the past week. That sole, lucky name? Wal-Mart, which was actually the Dow's worst performer over the past year. This is in line with the classic "Dogs of the Dow" theory, which holds that Dow underperformers in one year are set to outperform in the next.

14 percent: The amount that China's volatile Shenzhen Index has fallen in the past week. Trouble in China, heralded by a drop in China's yuan currency and a selloff in Chinese stocks, was probably the cause for the selloff.

11 percent: The amount that crude oil tumbled in the week. In a dynamic that watchers of the market in 2015 will find familiar, oil's drop to historical lows was a substantial drag on markets.

$1,048,976,678,385.80: The amount of value that the stocks in the S&P 500 lost over the past week, per noted S&P analyst Howard Silverblatt. For context, that's more than the 2014 gross domestic product of Guinea-Bissau.

99.3 percent: The number of voters from the Baseball Writers' Association of America who voted Ken Griffey, Jr. into the Baseball Hall of Fame. That's the most that any baseball player has ever received.

This number doesn't have much to do with markets, but Griffey's induction was one of the week's precious few bright spots.

—By CNBC's Alex Rosenberg.

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