The stable outlook on Rumo reflects that its intrinsic credit quality (or stand-alone credit quality [SACP]), which we assess as 'bb-', will remain fairly healthy despite the considerable investment plan, with debt to EBITDA and funds from operations (FFO) to debt of about 2.5x and above 25%, respectively, in 2020. A downgrade of Rumo is unlikely, because even if the SACP were to deteriorate, we're very likely to keep ratings unchanged, due to the group support coming from Cosan Ltd. (BB-/Stable/--). The two scenarios that could trigger a downgrade of Rumo are a sovereign downgrade, which would prompt us to lower rating on Cosan and Rumo, or a weakening of Rumo's SACP by more than three notches, assuming no changes