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The day after billionaire investor Carl Icahn dumped all his Apple Inc. (AAPL) stock and warned that the U.S. markets could be headed for a "day of reckoning," Berkshire Hathaway (BRK-A) Chairman Warren Buffett remained optimistic.

Speaking on CNBC, Buffett said he wouldn't put too much emphasis into one person's trade - referring to Icahn's decision to sell all of his Apple stock. "I don't know that I would pick out any one of them and put too much weight in what they did," Buffett said.

As government debt continues to rise and interest rates remain at unprecedented low levels, Icahn has called for greater measures from the U.S. government to spur growth and avoid the creation of asset bubbles. "I do believe in general that there will be a day of reckoning unless we get fiscal stimulus," Icahn said in an interview with CNBC.

However, Buffett wasn't so down-beat on the U.S. economy. Growth "is not booming, on the other hand it's not falling apart in any way shape or form either," Buffett said. 

On the low interest rate policy, Buffett said rates had remained low for longer than most people had expected, but doesn't believe it has created an asset bubble. He said it's a simple choice of allocating capital. "If you can get 15 percent, it makes the choices way different than if you get zero," Buffett said.

He also pointed out the consumer benefit of low interest rates. "Mortgage payments have dropped dramatically, so people have money to spend on other things," Buffett said.

As for the end game of low interest rate policy, Buffett was unsure. "I don't think anybody knows, exactly what the full implication are of low interest rates," Buffett said.

Buffett, known as the 'Oracle of Omaha' is in Nebraska for Berkshire Hathaway's annual meeting on Saturday. The meeting is preceded by Friday's release of the company's first-quarter earnings.

In a new initiative, the annual meeting will be live streamed. Buffett said the decision to stream it live was to allow all investors to get a sense of the company's direction and a better insight into his and Berkshire's vice chairperson Charles Munger's thinking.

"If we were partners with you in a small business, and were charged with running the place, you would want to look in occasionally to make sure we hadn’t drifted off into la-la land," Buffett said in his annual letter to shareholders earlier in the year.

They expect attendance at the annual meeting to be between 35,000- 40,000, down around 10% on last year's numbers.

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