A stock split is a corporate action that reduces the face value of existing shares in a defined ratio. For example, a stock split of 1:10 means that one existing share is split into ten shares. As a result, the face value of each share decreases to one-tenth of its original value.
Let's take an example: If an investor holds 500 shares of a company with a face value of Rs 10 each, a stock split in the ratio of 1:10 will increase the number of shares to 5000, but the face value of each share will decrease to Rs 1.
Companies often opt for stock splits when their share prices in the secondary market are perceived as very high, limiting investor participation. By reducing the price per share after the split, a stock split enhances market liquidity.