Last week’s violent stock selloff has resumed as a new week begins, with Asian and European markets tumbling, and US futures trading at session lows, but nowhere is the panic selling worse than in China, where the stocks, commodities and the yuan all tumbled. The CSI 300 equity benchmark slumped 4.9%, its biggest drop since Feb 2020, to the lowest level since May 2020 and wiping out gains from a March pledge by officials to support the economy as fears that the Covid breakout in Shanghai is spreading to Beijing, sparking new concerns about China’ economic and earnings growth outlook....