•Stocks tanked on Monday, pushing the S&P 500 to a new low for the year amid growing concerns that the Federal Reserve's plan to raise interest rates could be too much for the economy and stock market to handle.

The S&P 500 fell as much as 2.5 percent to 2,530.54, surpassing its February intraday low of 2,532.69. The broad market index finished the session down 2percent at 2,545.94, its lowest close for the year. The Dow Jones Industrial Average lost 507.53 points to close at 23,592.98, bringing its two-day losses to more than 1,000 points. Shares of Amazon and Goldman Sachs led the declines.

The Dow and S&P 500, which are both in corrections, are on track for their worst December performance since the Great Depression in 1931, down more than 7 percent so far for the month. The S&P 500 is now in the red for 2018 by 4 percent.

The tech-heavy Nasdaq Composite dropped 2.2 percent to finish the day at 6,753.73 as Microsoft dropped 2.9 percent. The Russell 2000 — which tracks the performance of smaller companies — entered a bear market, down 20 percent from its 52-week high.

Two benchmark U.S. stock indexes are careening toward a historically bad December.

Both the Dow Jones Industrial Average and the S&P 500 are on pace for their worst December performance since 1931, when stocks were battered during the Great Depression. The Dow and S&P 500 are down 7.8 percent and 7.6 percent this month, respectively.