The study looked at how managing money in banks affects how much profit they make in Sri Lanka. They found that investing in things that make more money in the long run is better than just having cash on hand. They used data from 26 banks over 20 years to see how different factors like how much money they have on hand and how much they lend out affect how much profit they make. They found that having more money to lend out and charging higher interest rates can help banks make more money. So, it's important for bank managers to find the right balance between having enough cash on hand and investing in things that make more money in the long run.