On September 30, Jabil Circuit is trading at $285.78, down 10.37%, as investors focus on the capacity buildout and back-end-loaded margin timing. - Fourth-quarter revenue was $10.6 billion and core EPS was $4.40, both ahead of estimates. - FY2027 guidance calls for $44.5 billion in revenue and $17.55 core EPS; Jabil expects 30 basis points of core margin expansion. - It brought new capacity online; the Nasdaq was up, and broader market tone does not explain the sharp decline.