US futures slide and are trading at session lows, as bond yields surge after yesterday’s Treasury announcement, having now erased the entire post buyback-boost move; yields are 4-5bps higher as the curve bear steepens sharply with the 10Y yield now at 4.69%, above where it was before the Treasury's press release yesterday, driven by a surge in Brent above $94 after Trump vowed to unleash an "Economic D-Day" on Iran's economy.