NEW YORK (AP) — US stocks drifted higher to more records on a holiday-shortened day of trading. The S&P 500 rose 0.3%. The Dow Jones Industrial Average climbed 0.6%, and the Nasdaq composite edged up 0.2%. Markets closed early for Christmas Eve and will remain closed for Christmas Thursday. The S&P 500 is up more than 17% this year, driven by optimism about artificial intelligence and deregulatory policies. Investors focus is on the U.S. economy’s direction and Federal Reserve interest rate policy. Unemployment claims fell last week, indicating a still-healthy labor market. Dynavax Technologies soared after French pharmaceutical company Sanofi said it would buy the vaccine maker.

THIS IS A BREAKING NEWS UPDATE. AP’s earlier story follows below.

NEW YORK (AP) — Wall Street slightly higher in midday trading Wednesday as markets hovered near record levels on a holiday-shortened trading day.

The Dow Jones Industrial Average was up 0.4% as of 11:15 a.m. Eastern. The S&P 500 index was up less than 0.2% and the Nasdaq Composite was down 0.1%.

Markets will close at 1 p.m. ET for Christmas Eve and are closed for Christmas. Markets will reopen for a full day of trading on Friday, however volumes are expected to be light this week with the holiday and most investors having closed out their positions for the year.

The S&P 500 is up more than 17% this year, as investors have embraced the deregulatory policies of the Trump administration and been optimistic about the future of artificial intelligence in helping boost profits for not only technology companies but also for broader Corporate America. The biggest performers this year include Nvidia and Micron Technologies, both companies that make chips or other components that power the proliferation of data centers across the country.

Much of the focus for investors for the next few weeks will be on where the U.S. economy is heading and where the Federal Reserve will move interest rates. Investors are betting the Fed will hold steady on interest rates at its January meeting.

The U.S. economy grew at a surprisingly strong 4.3% annual rate in the third quarter, the most rapid expansion in two years, driven by consumers who continue to spend in the face of ongoing inflation. There have also been recent reports showing shaky confidence among consumersworried about high prices. The labor market has been slowing and retail sales have weakened.

The number of Americans applying for unemployment benefits fell last week and remain at historically healthy levels despite some signs that the labor market is weakening.

U.S. applications for jobless claims for the week ending Dec. 20 fell by 10,000 to 214,000 from the previous week’s 224,000, the Labor Department reported Wednesday. That’s below the 232,000 new applications forecast of analysts surveyed by the data firm FactSet.

Dynavax Technologies soared 38% after Sanofi said it was acquiring the California-based vaccine maker in a deal worth $2.2 billion. The French drugmaker will add Dynavax’s hepatitis B vaccines to its portfolio, as well as a shingles vaccine that is still in development.

Novo Nordisk shares rose 2% after the weight-loss drug company got approval from U.S. regulators for a pill version of its blockbuster drug Wegovy. However, Novo Nordisk shares are still down almost 40% this year as the company has faced increased competition for weight-loss medications, particularly from Eli Lilly. Shares of Eli Lilly are up 40% this year.

European markets were moving slightly between slight gains and losses. Asian markets were also quiet, with Hong Kong moving up 0.2% while Japan’s Nikkei 225 fell 0.1%

Both gold and silver futures were higher, with silver prices rising more than 1%. U.S. crude oil rose 0.4% to $58.61 a barrel.