NEW YORK--(BUSINESS WIRE)--Mexican banks face hurdles ahead in sustaining growth in commercial lending to micro, small and medium enterprises (SMEs), says Fitch Ratings. As Mexico's interest rates see upward pressure over the medium term, we expect bank competition for SME loans to further intensify and asset performance to modestly weaken. Government-backed SME loan guarantees that provide first-loss coverage on a significant portion of borrowings have been key to maintaining SME asset quality