Top Midday Decliners

All three major US stock indexes were down more than 1% in late-morning trading Friday, as the markets looked as though they would end Christmas week on a down note.

In company news, UnitedHealth Group and Amedisys extended the deadline for closing their $3.3 billion merger, as the US Department of Justice scrutinizes the deal, a Friday filing showed. Under a waiver agreement executed Thursday, the deadline was extended to 10 days after a final court decision is issued in the lawsuit filed by the Justice Department to block the proposed merger or on Dec. 31, 2025, whichever comes first, the filing showed. UnitedHealth shares were down 0.3%, while those of Amedisys were up 4.5% around midday.

Microsoft-backed OpenAI is considering reorganizing itself to become a Delaware public benefit corporation in order to raise conventional capital while maintaining a nonprofit arm, the company said Thursday in a blogpost. OpenAI currently operates as both a nonprofit and for-profit entity, supported by investments from Microsoft and other companies, as well as from venture capitalists. Microsoft shares were down 2.0%.

Brookfield Asset Management and co-investors acquired a roughly 53% stake in French renewables developer Neoen for 39.85 euros ($41.53) per share, Bloomberg reported Friday. The group purchased the stake from shareholders and plans to launch a tender offer for the remaining shares at the same price in order to take the company private, the report said. Brookfield Asset Management shares were down 1.4%.

Nearly 65 million people across the US watched two NFL matchups on Christmas Day that were broadcast exclusively on Netflix , CNBC reported Friday, citing data from Nielsen. The viewership set records for the most streamed NFL games ever in the US, CNBC reported, citing Nielsen. Netflix shares were down 2.3%.

Taiwan's Ministry of Science and Technology said Friday that funding for semiconductors, AI and aerospace could drop by 20 billion Taiwanese dollars ($609.1 million) next year after opposition parties approved laws cutting economic and technology spending, Reuters reported. Shares of Micron Technology , Nvidia , Advanced Micro Devices (AMD) and Taiwan Semiconductor Manufacturing were down 1.2%, 2.2%, 0.6% and 1.0%, respectively.

Arthur J. Gallagher said Friday it has acquired Murray Gardner Insurance Agency based in Tustin, Calif. Financial details of the deal were not disclosed. Shares of Gallagher were down 0.5%.

BioNTech (BNTX) has entered into two separate settlements with the US national Institutes of Health and the University of Pennsylvania over royalties on sales of the company's Covid-19 vaccine, separate filings showed Friday. Without admitting liability, the biotech company said it agreed to pay $791.5 million to the NIH and $467 million to the University of Pennsylvania, according to the filings. Shares of BioNTech were up 0.8%.

Abby Schultz

Organizations representing the nation's largest banks and business groups sued the U.S. Federal Reserve on Tuesday for stress-test practices they say are opaque and lead to inaccurate capital charges.

The suit was filed a day after the Fed said it would seek public comment beginning early next year on the agency's plans to improve transparency in the annual stress-test process.

The lawsuit was filed in the U.S. District Court for the Southern District of Ohio Eastern Division by the Bank Policy Institute, the Ohio Chamber of Commerce, the Ohio Bankers League, the American Bankers Association, and the Chamber of Commerce.

In a Monday news release, the Federal Reserve said the board was seeking comment on changes that would "improve transparency of bank-stress tests, and reduce volatility of resulting capital requirements."

The proposed changes include seeking public comment on models that determine hypothetical losses and revenue of banks during stressful periods, in addition to allowing the public to comment on the scenarios the board uses before they are finalized, the Fed said in its release.

Next year, the Fed will "take immediate steps to reduce the volatility of the results and begin to improve model transparency," it said.

In a statement, the plaintiffs noted the Fed's acknowledgment of a problem, but they sued anyway to preserve their right to challenge the board's approach. That's because the statute of limitations on agency actions establishing the stress-test framework expire in February 2025.

"Filing comments on potential changes is great, but it doesn't change anything yet," Steve Stivers, president and CEO of the Ohio Chamber of Commerce told Barron's.

The stress tests were designed to ensure banks have enough capital to survive an economic downturn and were first instituted by the Fed after the financial crisis. The banking and business organizations filing the lawsuit agree stress tests are valuable, but "we just want them to be accurate," Stivers said.

According to the lawsuit, the Fed's lack of transparency into the models and scenarios they use each year for stress testing is illegal and ultimately harms businesses and consumers.

"We've talked to a lot of member banks, and we've talked to main street businesses that tell us they don't have as many opportunities as they think they could or should have to get credit," Stivers said.

The lawsuit could have been filed in any state, he added. Ohio is home to several regional banks — including KeyCorp, Fifth Third Bancorp, and Huntington Bancshares — all of which serve consumers in addition to middle-market and large businesses.

"For years, we have highlighted serious concerns about the stress testing framework and the need for reform," Greg Baer, the Bank Policy Institute's president and CEO, said in a statement on Tuesday. "The current opaque regime, combined with the lack of clear standards for the global market shock and the operational risk charge, continues to produce capital charges that are inaccurate, volatile and excessive, resulting in reduced lending and economic growth."

The institute, which represents major banking organizations including Bank of America, Citigroup, Goldman Sachs Group, and JPMorgan Chase, among others — and the co-plaintiffs — argue that secrecy surrounding the current stress-testing framework violates the Constitution and federal statutes such as the Administrative Procedure Act, according to a statement.

The APA requires public notice and a comment period for any significant regulatory changes, the statement said. But the Federal Reserve often "substantially" changes the minimum amount of capital a bank must hold without doing so, the statement said. "Subjecting the work and thinking behind these capital charges to public scrutiny would allow errors, mistakes and poor policy choices to be clearly illuminated, and thus corrected," the statement said.

According to the plaintiffs, "arbitrary, counterintuitive, and sometimes inaccurate results," occur each year. "The lack of transparency and volatility in the results makes it difficult for banks to plan and manage capital effectively, leading to higher borrowing costs for their customers," they said.

A Federal Reserve spokesman didn't immediately have a comment on the lawsuit.

Write to Abby Schultz at abby.schultz@barrons.com

This content was created by Barron's, which is operated by Dow Jones & Co. Barron's is published independently from Dow Jones Newswires and The Wall Street Journal.