Equities in Asia are mixed with gains for tech stocks offsetting slumping commodity shares. Wall Street futures are pointing slightly lower after gains across the big three indexes led by a rally for the tech-heavy Nasdaq. Treasury yields and the dollar hover above multi-week lows awaiting comments from Federal Reserve Chair Jerome Powell. Crude oil sinks to a three-month low due to a build in US stockpiles while concerns for the Chinese economy weigh on demand.