TOKYO, Oct 2 (Reuters) - Citigroup is being investigated by Japanese regulators for possible infractions related to its marketing of financial products and could face its third major punishment in Japan in 7 years, a source with knowledge of the matter...

* Fight centers on status of claim from Lehman European arm * Trustee says should not be given customer status * If allowed, could limit reimbursement for other customers By Nick Brown Sept 30 (Reuters) - The trustee liquidating Lehman Brothers' (LEHMQ.PK:...