Stock market volatility persists amidst economic uncertainty and Fed signals.

US stock futures are expected to open flat on Friday as investors focus on economic data for clues on the Federal Reserve's rate-hike campaign. The University of Michigan's consumer sentiment report is due later today. Meanwhile, global equities are rising to their highest levels in 14 months, buoyed by hopes for more Chinese stimulus and an end to Fed rate hikes. Virgin Galactic's stock rose as much as 42% in pre-market trade on Friday after the company announced plans to begin commercial space operations later this month.