After the first trading day, stock futures rose slightly Wednesday night as investors moved past earlier concerns about the spread and impact of the omicron Covid version.

Futures contracts that are tied to Dow Jones Industrial Average gained 0.08%. S&P 500 futures and Nasdaq 100 futures both rose 0.1%.

The Dow rose 0.7% in regular trading. This brought its rally of more than 800 points to over 800. The S&P 500 climbed 1% to 4,696.56 and now sits 1% away from its record. Nasdaq Composite rose 1.2%. The week will end higher for all three averages.

After a losing streak of three days for major averages that began Tuesday, fears over the spreading speed of Covid-19 prompted a rebound. It was the worst decline for the S&P over a three-day period since September. It was also the Nasdaq’s worst three-day period since May.

Angelo Kourkafas from Edward Jones, an investment strategist, said that December is not supposed to be a volatile month. We are now within reach of new record highs. “We have experienced a strong rebound in the last two days. This two-day rally is a sign of confidence that the economy can navigate the threat of the omicron variation.

However, the trading market was very thin going into the Christmas holidays.

On Wednesday, tech and consumer discretionary stocks were the largest gainers. Tesla shares rose 7% following Elon Musk’s announcement that he has reached the goal of selling 10% shares to tax purposes.

The Food and Drug Administration will be open Wednesday granted emergency use authorization for Pfizer’s Covid pill, the first oral antiviral drug against the virus. Shares of Pfizer rose by about 1%.

Investors will be able to access key inflation data, such as prices for personal consumption core expenditures. A number of consumer sentiment indicators and claims for unemployment will be made public.

— CNBC’s Jesse Pound contributed reporting.