Headline: Futures drop on Greek referendum, Asian growth
NEW YORK (Reuters) - Stock index futures tumbled on Tuesday as the deal to rescue Greece and prevent a wider sovereign debt crisis faced a new hurdle and as Asian economic data reignited fears of a slowdown in global growth.
Greek Premier George Papandreou said he will put Greece's bailout deal through a referendum, throwing the long-awaited deal into disarray and sending European stocks down 3.5 percent. The region's bank shares fell 6 percent.
U.S. bank shares were expected to follow European lenders lower. The Financial Select Sector SPDR fell 2.3 percent in light premarket trading.
"The market did not see this Greek referendum coming, which is potentially a killer and could knock the wheels off the bus of the whole (European rescue) plan," said Paul Mendelsohn, chief investment strategist at Windham Financial Services in Charlotte, Vermont.