Capital in trading refers to the total funds allocated by an investor or trader for active market participation — the financial resources deployed in buying securities, maintaining margin requirements for F&O positions, and funding trading operations across different strategies and time frames. Effective capital management is one of the most critical disciplines in trading — determining how much capital to allocate per trade (position sizing), how much to hold in reserve for margin calls and opportunistic entries, and how to balance risk across multiple simultaneous positions. Professional traders typically risk a maximum of 1% to 2% of their total trading capital on any single trade — ensuring that a string of losing trades cannot cause catastrophic account drawdown. In Indian equity markets, capital requirements differ significantly by trading approach: intraday equity trading uses margin (typically 3x to 10x leverage on the available capital), F&O trading requires SPAN plus exposure margin (approximately 10% to 15% of contract notional value), and delivery-based equity investing requires full payment upfront. For new traders entering Indian markets, SEBI's studies consistently show that inadequate capital allocation, overleveraging, and poor position sizing are among the primary causes of retail trader losses — making disciplined capital management as important as strategy development for achieving consistent trading profitability over time.