Handelsblatt reports that internal files and chats could show history on profits of T-Mobile and could cost Deutsche Telekom (DTE GY) billions

Reports of this kind, where internal documents surface in the press before any formal proceeding, tend to follow a familiar sequence: an initial headline-driven markdown in the parent, then a waiting period while the market establishes whether the files feed into an existing investigation, a tax dispute, a damages claim, or merely journalistic reconstruction. The distinction that matters is the nature of the alleged exposure: a tax or accounting question over historic profits carries a different transmission channel and a more quantifiable ceiling than a conduct or competition claim, which tends to be open-ended. The parent-subsidiary structure here is the complicating factor, since any liability attached to the US unit still transmits to the holder through its majority stake and through group-level disclosure obligations. The company response, typically a brief denial or a no-comment, is usually the first tell of seriousness; the second is whether a regulator, tax authority, or counterparty formally engages. Episodes driven by leaked internal communications have historically been prone to large initial estimates that compress on detail. The word 'could' in the sourcing is doing the heavy lifting, and the gap between headline quantum and eventual settlement in comparable cases has generally been wide.