Wall Street futures slide up to 0.8% as crude tops $105 a barrel; Dow futures down 400 points

Brent crude's surge above $105/bbl tightened financial conditions, lifting 10-year U.S. yields and pressuring global equities and rate-sensitive sectors. Fed Governor Waller's signal that additional hikes may be needed reinforced higher-for-longer expectations, weighing on U.S. futures and broad Asian benchmarks. Elevated energy prices also raise inflation risk and squeeze margins, amplifying downside pressure across risk assets and cyclicals.