A stock split divides existing shares into more shares of smaller face value. In a 1:5 split, each ₹10 face value share becomes five ₹2 shares, and the price falls to roughly a fifth. If you held 100 shares at ₹4,000, you hold 500 at about ₹800 afterwards; the total value, ₹4,00,000, is unchanged. Companies split to make the share price look affordable and to improve liquidity, since many retail investors are put off by a four-figure price. A split changes nothing about the business, its profits or your ownership percentage. Charts adjust historical prices so the split does not appear as a crash. Prices sometimes rise around split announcements on sentiment, and sometimes do not. A bonus issue is similar in effect but works by issuing extra shares from reserves. Check the record date to know whether you qualify.