Underlying Asset

The underlying asset is the financial instrument upon which a derivative contract — options, futures, or swaps — is based. The derivative "derives" its value from the price movements of this underlying asset. For a Reliance Industries call option, the underlying asset is Reliance Industries shares. For a Nifty 50 futures contract, the underlying is the Nifty 50 index.

Understanding the underlying is fundamental to derivatives trading because all derivative pricing, margin calculations, and settlement mechanics reference back to it. The Premium of an option changes based on the underlying's price, Volatility, and other factors captured by the Options Greeks. A futures contract's price closely tracks the underlying's spot price, converging at expiry.

On NSE, derivatives are available on several categories of underlyings. Equity derivatives cover individual stocks (about 200+ F&O-eligible stocks) and indices (Nifty 50, Bank Nifty, Finnifty, Midcap Nifty). Currency derivatives use exchange rate pairs (USD/INR, EUR/INR, GBP/INR, JPY/INR) as underlyings. Commodity derivatives on MCX use physical commodities (gold, silver, crude oil, natural gas) as underlyings.

The relationship between the derivative and its underlying determines the contract's behaviour at expiry. For stock options and futures that go to physical settlement (as mandated by SEBI for stock derivatives), the actual shares change hands. For index derivatives, which cannot be physically delivered, settlement is in cash — the difference between the contract price and the index level at expiry.

When analysing any derivative position, always start with the underlying. If you don't have a view on the underlying asset's direction and Volatility, you have no business trading its derivatives. Derivative strategies like straddles, strangles, and iron condors are expressions of specific views on the underlying — directional, volatility-based, or time-decay-focused. The underlying asset is the anchor for all of these.