The article examines how new banking rules called Basel 3 affected the stability of Eurozone banks from 2011 to 2014. They found that the leverage ratio was the most important factor for bank stability. The impact of Basel 3 rules on bank stability was similar in both the years when the rules were in place and the years before. Traditional banks like cooperative and savings banks benefited more from Basel 3 rules compared to diversified banks. The study suggests that the way Basel 3 rules were implemented may have led banks to make risky financial decisions, and that a more tailored approach to banking regulations might be better.