Decade-long rally on Wall Street looks like it will be ending

After almost 10 years, Wall Street’s rally looks like it’s ending.

Another day of big losses Friday left the U.S. market with its worst week in more than seven years. All of the major indexes have lost 16 to 26 percent from their highs this summer and fall. Barring huge gains during the upcoming holiday period, this will be the worst December for stocks since 1931.

There hasn’t been one major shock that has sent stocks plunging. Investors fear a recession is coming and are finding more and more reasons to worry. The U.S. has been locked in a trade dispute with China for nine months. Economies in Europe and China are slowing. And rising interest rates in the U.S. could slow its economy, too.

Stocks are now headed for their single worst month since October 2008, when the market was being battered by the global financial crisis.

December is generally the strongest time of the year for U.S. stocks. Traders often talk about a “Santa rally” that adds to the year’s gains as people adjust their portfolios in anticipation of the year to come.

But not this year.

No sector of the market has been spared. Large multinational companies join smaller domestic ones in their losses. And huge high-tech companies, once the bestperforming stocks on the market, are now leading the way lower.

Technology’s huge popularity during the recent boom years made it even more vulnerable as investors’ moods turn sour. Amazon, Facebook, Apple, Netflix, and Google’s parent company, Alphabet, have seen their market values fall by hundreds of billions of dollars.

The Nasdaq composite, which contains a high concentration of tech stocks, has sunk almost 22 percent from its record high in late August. Several big technology companies, notably Facebook and Twitter, have also suffered as a result of scandals over matters such as data privacy and election meddling, and traders worry that the industry will face greater government regulation that could increase costs and affect their profits.

After a sharp early gain Friday, the S&P 500 index retreated 50.84 points, or 2.1 percent, to 2,416.58. The S&P 500, the benchmark for many index funds, has fallen 17.5 percent from its high in September.

The Dow Jones Industrial Average sank 414.23 points, or 1.8 percent, to 22,445.37. The Nasdaq skidded 195.41 points, or 3 percent, to 6,332.99. The Russell 2000 index of smaller-company stocks lost 33.92 points, or 2.6 percent, 1,292.09.