Jane Street Lost $15 Billion in Its First Down Month in a Decade

Jane Street posted roughly $15 billion of losses in July — its first monthly slump in about a decade — as AI-focused hedge fund Situational Awareness swooned and dragged down asset prices across equity markets, according to a person familiar with the matter.Jane Street posted roughly $15 billion of losses in July — its first monthly slump in about a decade — as AI-focused hedge fund Situational Awareness swooned and dragged down asset prices across equity markets, according to a person familiar with the matter.