Modine Manufacturing is trading 10.79% lower at $176.69, with broad market weakness a likely contributor. - U.S. stocks faced pressure as oil prices rose and Treasury yields climbed after President Trump rejected Iran’s proposal, reviving inflation and interest-rate concerns; major U.S. indices were down more than 0.5%. - Spin-off-related due-bill trading began September 28, but the announcement does not identify it as the cause of the share-price decline.