Stock markets and banks that work well can help economies grow in the long term. A study found that when stock market liquidity and banking development are good, it leads to more growth, saving money, and making businesses more efficient. This is true even when other economic and political factors are taken into account. The study also showed that the size, volatility, and international connections of stock markets don't always affect growth. And surprisingly, none of these financial factors are strongly linked to how much people save.