The following ratings changes were generated on Wednesday, Oct. 8.We downgraded America Movil ( AMX), a wireless communications provider in Latin America, from buy to hold. It exhibits robust revenue growth, notable return on equity and growth in earnings per share, but weaknesses include poor debt management and a generally disappointing stock performance. At 19% year over year, revenue growth came in higher than the industry average of 6.3%, helping to boost EPS by 25% to $3.06 in the most recent quarter compared with $2.24 a year ago. The company's two-year positive pattern of EPS growth should continue, suggesting improvement in business performance. This year, the market expects further improvement to $3.66. The gross profit margin for America Movil is rather high at 58.5%, having increased from the same quarter the previous year. However, the net profit margin of 20.8% trails the industry average.