Trump said he will raise tariffs on $250 billion in Chinese goods to 30% and hike duties on another $300 billion in products to 15%.Politicsread more
The European Union will respond in kind if the U.S. imposes tariffs on France over digital tax plan, EU chief Donald Tusk told G-7.Technologyread more
Stocks dropped after Donald Trump ordered that U.S. manufacturers find alternatives to their operations in China.US Marketsread more
The final week of August could be highly volatile as markets fret over the economy and the latest developments in trade wars.Market Insiderread more
Federal Reserve Vice Chair Richard Clarida said Friday that the global economy has deteriorated in the past month.Marketsread more
The latest escalation in the trade war ups the odds the economy will fall into recession and that the Fed will aggressively cut rates.Market Insiderread more
Here are the products that stand to be the most affected by China's new tariffs on $75 billion worth of U.S. goods.Marketsread more
"We don't need China and, frankly, would be far better off without them," Trump tweeted.Politicsread more
Recent trade friction between the two Asian powerhouses has morphed into a dispute with political implications that go far beyond the region.Asia Politicsread more
"My only question is, who is our bigger enemy, Jay Powell or Chairman Xi?" Trump wrote amid a series of tweets that rattled markets Friday.Politicsread more
"I would love this to be clarified. We come to a deal on trade, boy, this market is up 10 to 15%, but without it's going to be worrisome," Jeremy Siegel says.Marketsread more
Warren Buffett gained more wealth than any other U.S. billionaire, adding $37 million a day, according to one study.
Through Dec. 11, Buffett's net worth—at least on paper—shot up by $12.7 billion to $59.1 billion in 2013 from $46.4 billion at the start of the year, according to Wealth-X, the wealth research firm. That works out to a paper gain of $1.5 million an hour.
(Read more: Just how fast are the rich getting richer?)
Gates is still the richest man in America. But he was the number two gainer in dollar terms this year, with his paper wealth soaring by $11.5 billion to $72.6 billion. Casino tycoon Sheldon Adelson was third, with an $11.4 billion gain to $35.3 billion.
The gains were fueled almost entirely by rising stock prices, which boosted the value of company shares held by founders and corporate chiefs. And the wealth was spread throughout all industries, suggesting that the broad stock market gains have been the chief wealth driver this year—rather than industry-specific gains in tech, energy or other sectors.
(Read more: Millionaires become the 'family bank')
The top 10 billionaire gainers saw their wealth increase by a combined $101.8 billion—more than the GDP's of Puerto Rico or Slovakia.
Here is the full list.
Top billionaire gainers in 2013
—By CNBC's Robert Frank. Follow him on Twitter .