Warren Buffett admits to a rare 'mistake'

New York(CNN Business) The Oracle of Omaha said he made a mistake.

In his annual letter to shareholders of Berkshire Hathaway (BRKB), investing guru Warren Buffett disclosed that the company took an $11 billion writedown last year on its 2016 purchase of Precision Castparts, describing it as "a mistake."

The 90-year-old billionaire, Berkshire's chairman since 1970, said in the company's annual letter to shareholders that the "ugly" writedown had a simple explanation.

"I paid too much for the company," he said. "My miscalculation was laid bare by adverse developments throughout the aerospace industry."

Despite that loss and fallout from the pandemic in general, the company's operating businesses enjoyed a solid end to 2020. The sprawling conglomerate, which owns Geico, Dairy Queen, the Burlington Northern Santa Fe Railway Company, Duracell batteries and many other consumer, financial, industrial and energy companies, said Saturday it posted a net profit of $35.8 billion in the fourth quarter, an increase of 23%.

Berkshire's operating profit rose nearly 14% in the quarter, to $5 billion.

The Oracle of Omaha goes to Hollywood

In the letter, Buffett also disclosed that Berkshire Hathaway's annual shareholder meeting on May 1, normally held in Buffett's home town of Omaha, Nebraska, will instead be livestreamed from Los Angeles so that vice chairman Charlie Munger, who lives in Southern California, can attend.

The 97-year old Munger did not attend last year's virtual shareholder meeting in Omaha due to the Covid-19 pandemic. Instead, Buffett was joined on stage by another Berkshire vice chairman, Greg Abel.

"I missed him last year and, more important, you clearly missed him," Buffett said of Munger, who is also chairman of California newspaper publisher Daily Journal (DJCO), which held its own shareholder meeting on Wednesday in Los Angeles.

Buffett said Abel and Berkshire's third vice chairman, Ajit Jain, will also be on stage in LA to answer questions during the virtual May 1 meeting, which is scheduled to last from 1:30 p.m. ET until 5:30 p.m. Buffett said he hoped Berkshire can once again hold an in-person meeting in Nebraska in 2022.

As he often does in Berkshire's annual letter to shareholders, Buffett -- who has a net worth of some $90 billion -- dispensed some words of wisdom about the current state of the market.

Staying away from bonds and buying back more Berkshire stock

He is not currently a fan of bonds because despite a recent uptick, yields remain historically low. "Bonds are not the place to be these days," he wrote, adding that the yield on the 10-year Treasury, now hovering around 1.46%, was 15.8% in 1981.

"In certain large and important countries, such as Germany and Japan, investors earn a negative return on trillions of dollars of sovereign debt. Fixed-income investors worldwide -- whether pension funds, insurance companies or retirees -- face a bleak future," Buffett noted.

He also defended Berkshire's propensity for using cash to buy back its own stock. The company spent $24.7 billion last year to repurchase shares. Some investors have argued that Berkshire could find a better use for its cash, which totaled more than $138 billion in cash at the end of 2020. Berkshire could it use to make more acquisitions.

"In no way do we think that Berkshire shares should be repurchased at simply any price," Buffett wrote. "American CEOs have an embarrassing record of devoting more company funds to repurchases when prices have risen than when they have tanked. Our approach is exactly the reverse."

Still, some wonder if Buffett has lost his Midas touch. Berkshire Hathaway's stock is up just 11% over the past year, compared to a nearly 23% gain for the S&P 500. The company has lagged the broader market during the past five years, too, despite being a major investor in Apple (AAPL).

'Hamburgers and Coke'

Buffett, however, defended the company's investment strategy, describing it as like a classic diner.

"At Berkshire, we have been serving hamburgers and Coke for 56 years. We cherish the clientele this fare has attracted," Buffett wrote.

Although he has dipped his toe into higher techs like Apple and Amazon (AMZN) recently, the majority of Berkshire's investments are in slower growth "value" stocks such as Chevron (CVX), Verizon (VZ), American Express (AXP) and, yes, Coca-Cola (KO). (Buffett is an avid drinker of Cherry Coke.)

In other words, don't expect Buffett to start investing in meme stocks like GameStop (GME) or momentum darlings such as Tesla (TSLA).

"The tens of millions of other investors and speculators in the United States and elsewhere have a wide variety of equity choices to fit their tastes. They will find CEOs and market gurus with enticing ideas," he said. "Many of those investors, I should add, will do quite well."

But Buffett stressed a more patient approach to investing.

"All that's required is the passage of time, an inner calm, ample diversification and a minimization of transactions and fees," he said.