The article tests if stock prices in the National Stock Exchange follow a random walk process, which is a key aspect of market efficiency. The researchers want to see if stock prices move randomly, without any predictable pattern. This is important because it helps determine if the market is efficient in reflecting all available information. The findings will show whether the stock prices in the National Stock Exchange behave in a way that supports the idea of a random walk, which is a key concept in understanding how stock markets work.