Stocks on both sides of the Atlantic gained, pushing the Standard & Poor's 500 Index to a record high, after the European Central Bank reduced borrowing costs, while US unemployment claims posted a surprise decline.
And Warren Buffett, the 82-year-old billionaire, sent his first tweet-and then promptly attracted followers at an initial rate of about 1,000 a minute.
The key news was the ECB dropping its deposit rate to a record low 0.5 per cent from 0.75 per cent after policy makers met today-and a hint it was open to the idea of a negative rate-to help stem further deterioration in the euro zone economy.
Indeed, the region's manufacturing output shrank in April for a 21st consecutive month, according to Markit Economics data.
"The cut in interest rates should contribute to support prospects for a recovery later in the year," ECB president Mario Draghi said in a statement. "Against this overall background, our monetary policy stance will remain accommodative for as long as needed."
Europe's benchmark Stoxx 600 Index ended the session with a gain of 0.3 per cent from the previous close on Tuesday. Key national stock indexes also rose in Paris, London and Frankfurt, adding 0.1 per cent, 0.2 per cent and 0.6 per cent respectively.
"The fashion right now for all central banks is to help the economy with a lot of money, and this will go on, and this will lead equity markets higher," Herbert Perus, who helps oversee US$36 billion as head of equities at Raiffeisen Capital Management in Vienna, told Bloomberg.
Yesterday, US Federal Reserve policy makers signalled an ongoing commitment to their program of purchasing US$85 billion of bonds a month to fuel the pace of the recovery. The Fed continues to link its pace of asset buying to the nation's jobless rate.
In afternoon trading in New York, the Dow Jones Industrial Average gained 0.82 per cent, the Standard & Poor's 500 Index climbed 0.92 per cent, while the Nasdaq Composite Index rose 1.31 per cent. The S&P 500 touched a record 1,598.60 earlier in the session.
Labor Department figures today showed that the number of applications for unemployment insurance payments dropped by 18,000 to 324,000 in the week ended April 27.
The surprise decline came hot on the heels of yesterday's disappointing ADP National Employment report. All eyes are now on Friday's government payrolls report. Economists' polled by Reuters predict employers hired 145,000 people last month, while the unemployment rate remained steady at 7.6 per cent.
The latest US earnings also gave rise to optimism. Shares of Facebook climbed, last up 5.3 per cent, as did those of General Motors, last up 3.6 per cent, and Visa, last up 5.9 per cent, amid results that surpassed expectations.
Of the 381 companies in the S&P 500 that have reported results so far, 73 per cent exceeded analysts' earnings predictions while 53 per cent missed on sales, according to Bloomberg.