Markets closed lower after poor GDP and housing data despite a fall in weekly jobless claims. Tensions in Ukraine persist, with Obama warning over further sanctions for Russia. Citigroup shares fell and several financial stocks nosedived after failing to meet the Fed Reserve's stress tests. Some traders suggest investors are using volatility to take profits in more speculative sectors such as biotechs and technology as the S&P fails to hold above 1850. Jane Searle reports from the NYSE.

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