Shanghai's International Energy Exchange (INE) has modified trading requirements for its container shipping index due to a surge in prices following Red Sea vessel attacks. The April container shipping index European line futures jumped 20%, reaching 1,744.9 index points, with a 78% increase since the previous week. Expectations of reduced shipping capacity and higher costs from rerouting drove the surge. The INE, citing increased market uncertainties, has raised margin ratios and widened trading bands for April, June, August, October, and December contracts, urging investors to exercise caution. The adjustments come as global shipping rates rise, impacted by the Red Sea crisis and rerouting measures.