This paper makes an empirical analysis of the effect of bank transparency on credit. Therefore, an analysis of panel data which considers 310 banks that have shares traded on the NYSE and NASDAQ for the period extending from the first quarter of 1990 to the fourth quarter of 2009 is made. As a measure of bank transparency, an opacity index that represents the difference between the real risk taken by banks and the perception of the economic agents on that risk is built. Furthermore, this study considers how events of “credit sudden stop” may interfere in the relationship between transparency and bank credit. The findings indicate that an increase in the bank transparency contributes to creating an environment conducive to amplifying credit without generating speculative bubbles.