Wall Street's main indexes closed largely unchanged Thursday, amid light trading the day after the Christmas break, as rising U.S. Treasury yields weighed on some of the dominant technology megacaps.

On a day of few catalysts, investors responded to yields on U.S. government bonds inching higher, including the yield on the benchmark 10-year Treasury note hitting its highest since early May at 4.64% earlier in the session.

A strong auction of seven-year notes early in the afternoon though helped yields come off slightly, with the 10-year note at 4.58% in late-afternoon trade.

Higher yields are traditionally seen as negative for growth stocks, as it raises the cost of their borrowing to fund expansion. With markets increasingly dominated by the megacap technology stocks known as the Magnificent Seven, crimping their performance - especially in lieu of other market catalysts - will put downward pressure on benchmark indexes.

According to preliminary data, the S&P 500 lost 2.66 points, or 0.04%, to end at 6,037.09 points, while the Nasdaq Composite lost 10.74 points, or 0.05%, to 20,020.38. The Dow Jones Industrial Average rose 28.52 points, or 0.06%, to 43,325.55.

Among those megacap stocks, Tesla. Amazon.com and Meta Platforms slipped. Apple increased, continuing to edge closer to becoming the first company in the world to hit a market value of $4 trillion.

The megacap tech stocks came off somewhat in the summer, as investors sought to rotate some capital into other sectors offering more value. Since the U.S. elections in November though, they have resumed their drive upwards and have outperformed the equal-weighted version of the S&P 500, said Adam Turnquist, chief technical strategist for LPL Financial.

"As a technician, what you want to see is breakouts in absolute terms and relative terms and the Mag 7 is checking the boxes there, so very constructive leadership going into the year-end," he said.

The three main indexes have hit multiple record highs this year on hopes of a lower interest rate environment and the prospects of artificial intelligence boosting corporate profits.

However, U.S. stocks have hit a speed bump in the final month of the year following an election-led rally in November as investors assess the Federal Reserve's projection of fewer interest rate cuts in 2025.

Looking ahead, LPL Financial's Turnquist said the last few weeks have seen significant reliance on the Magnificent Seven stocks driving markets higher, and we may be starting to see the cracks in this momentum. Therefore, to see further benchmark index increases, we will need to see input from other sectors of the economy.

Markets in Europe, London and parts of Asia were closed on Thursday.

One data release on Thursday showed the number of Americans filing new applications for jobless benefits dipped to the lowest in a month last week, consistent with a cooling but still healthy U.S. labor market.

Markets are in a seasonally strong period - called the "Santa Claus rally" - a pattern attributed to low liquidity, tax-loss harvesting and investing of year-end bonuses.

The S&P 500 has gained an average of 1.3% in the last five trading days of December and the first two days of January since 1969, according to the Stock Trader's Almanac.

Cryptocurrency-related stocks were down after bitcoin declined. MicroStrategy, MARA Holdings and Coinbase Global all fell.

Among the 11 S&P sectors which traded lower were consumer discretionary and the energy index, which tracked marginal weakness in U.S. crude prices.