NEW YORK & MONTERREY, Mexico--(BUSINESS WIRE)--Smaller, niche and less mature Mexican banks are more likely to face challenges passing the phase-in requirements of the Basel III Liquidity Coverage Ratio (LCR), says Fitch Ratings. The challenges will stem from the less stable funding of smaller Mexican banks relative to the country's larger banks. Some smaller banks, perhaps up to 20% of the overall 45 banks operating in Mexican system, could require a longer period to reach full LCR compliance,