Market Preview: Futures suggest a weak open, with benchmark S&P dipping -0.5% following...

|By:, SA News Editor
Market Preview: Futures suggest a weak open, with benchmark S&P dipping -0.5% following reports on jobless claims, productivity, same-store sales (I, II, III) and an ECB decision to hold rates steady. There's plenty of Fed-speak still ahead (today's calendar), and recent volatility trends look likely to continue.