The S&P 500 is on track for its worst January ever. Here’s why stocks are getting hit so hard

It’s a sea of red in the stock market on Monday, and there are several factors that are dragging stocks down in January.

The Dow Jones Industrial Average fell as much as 1,000 points on Monday. The S&P 500 is off by 2%, with only a handful of companies in the entire index trading in the green. The Dow and S&P 500 are now on pace for their worst month since March 2020, when the market fell into turmoil amid the pandemic.

The Nasdaq Composite is down 4.2% on Monday. The index is on pace for its worst start to the year since 2008.

And maybe most notably, the S&P 500, off 10% this month, is headed for its worst January ever. This is unusual as the stock market typically starts the year on strong footing as investors put money to work in stocks.

Though some areas of the market considered more expensive or speculative began to struggle in November, the broader market took a big step back during the first week of January following increasing hints from the Federal Reserve that the central bank will take aggressive action to slow down the jump in consumer prices.

“Over the past month, the Federal Reserve (Fed) has made it increasingly clear that it is serious about fighting that inflation,” the Wells Fargo Investment Institute said in a note to clients on Jan. 19.

The central bank has signaled that it plans to stop its asset purchases, hike rates and possibly reduce its balance sheet, starting in March. Government bond yields have surged in preparation for the rate increases, with the U.S. 10-year Treasury rising more than 40 basis points this year alone to nearly 1.9% at its high point after finishing last year just above 1.5%. (1 basis point equals 0.01%.)

Investors are now expecting four rate hikes this year, with some officials warning that more may be needed, after most Wall Street pros expected just one or two hikes a few months ago.

“The Dec. 15 minutes that came out on Jan. 5, they were a shock to investors,” Ed Yardeni, founder of Yardeni Research, said on CNBC’s “Halftime Report” on Monday.

The Fed will give its latest update on Wednesday. While it’s unlikely to raise rates at this meeting, market experts believe the central bank will stick with its plan tighten financial conditions despite the market decline given the high level of inflation.

Concerns about persistent inflation, supply chain disruptions from new Covid variants and the potential for conflict in Ukraine are other factors that have weighed on the risk appetites for investors.

Technology stocks with high valuations got hit first and are continuing to get hit.

Last week, the technology-focused Nasdaq Composite fell into correction territory, marking a 10% drop from its November 2021 record close. The index has since fallen deeper into its rut, just a few percentage points away from reaching a bear market.

Climbing bond rates typically disproportionally punish growth stocks as their future earnings growth become less attractive as rates rise. The growth expectations for tech stocks have also weakened as Wall Street analysts have gotten a better sense of what the post-pandemic economy may look like.

“Since the end of 3Q21, 2022 earnings estimates for [the Nasdaq 100] fell 0.8%, while estimates for the S&P 500 rose 1.9%, indicating weaker fundamentals for Growth stocks relative to the overall market,” Bank of America equity and quant strategist Savita Subramanian said in a note on Monday.

Many of the biggest stocks in the market are tech names, so their declines can have a major impact on market averages. Now, the selling pressure is feeding on itself as investors dump risk assets, dragging every stock sector but energy down in January.

The cryptocurrency market has been hit hard as well. The price of bitcoin fell below $34,000 on Monday morning, bringing its year-to-date losses to roughly 30%. Since its record high in November, the largest cryptocurrency has lost about 50%.

The price of ethereum has seen a similar decline over that time period.

To be sure, the health of the economy is looking good. The unemployment rate has fallen to 3.9% after a record year of nonfarm payrolls growth. Other metrics of economic growth are positive, even if they show a slower recovery than in 2021.

Earnings season is also turning out to be a strong one, despite some disappointing reports from high-profile firms. More than 74% of S&P 500 companies that have reported results have topped Wall Street’s earnings expectations, according to FactSet.

Covid-19 cases are also coming down. After exploding to staggering new highs amid the spread of the highly transmissible omicron variant, Covid-19 cases started to come down in New York State over the last two weeks, according to Gov. Kathy Hochul, leading to hope that other areas of the U.S. can see a similarly quick wave.

-CNBC’s Michael Bloom contributed to this report.