Theta

எளிய மொழி விளக்கம்

Option theta is the modelled change in option value as time passes, holding other inputs constant.

இது ஏன் பயனுள்ளது

Theta is useful as descriptive evidence when it is compared on the same definition, source, period, unit and exact listing. It is one input to research, not a verdict.

XMarketRadar-ல் எங்கு தோன்றும்

Look for Theta in Futures, Option Chain, Options Screener and derivative study tables for a selected underlying and contract.

எப்படி கணக்கிடப்படுகிறது அல்லது பெறப்படுகிறது

XMarketRadar calculates Theta locally with Black-Scholes-Merton using spot, strike, years to expiry, NSE-published implied volatility and a fixed 7% risk-free-rate assumption. NSE supplies IV, not the Greek. The implementation has no dividend-yield input; theta is per day and vega per one volatility-percentage-point change.

உள்ளீடுகள், காலம் மற்றும் அலகு

Read the disclosed inputs or source, observation period, bar interval, unit, native currency and scale. A value without its source and as-of context is incomplete; unlike units must not be combined.

நடைமுறை உதாரணம்

Illustrative only: Theta of −₹0.30 per day means the model attributes about ₹0.30 of value loss to one day passing, all else equal; real prices need not follow it.

உயர்வு மற்றும் தாழ்வு பொருள்

A higher or lower Theta value is descriptive, not automatically good or bad. Meaning depends on the instrument, comparison period, method and related evidence.

நேர், எதிர் மற்றும் உண்மையான பூஜ்ஜியம்

Positive and negative Theta values retain the definition shown here. A genuine reported or computed zero is displayed as 0 and is not the same as missing evidence.

எப்போது கிடைக்காது

Unavailable (—) means Theta is absent, unsupported, stale under the screen's rules or not computable from verified inputs. It must never be converted to zero or a neutral signal.

வரம்புகள் மற்றும் பொதுவான தவறுகள்

Greeks and IV are model estimates, not guaranteed realized changes. XMarketRadar's Black-Scholes-Merton calculation assumes a fixed 7% risk-free rate and has no dividend-yield input; exercise style, carry, stale quotes or a different rate can materially change the result.

சந்தை சார்ந்த வேறுபாடுகள்

Contract size, exercise style, expiry, settlement, price unit and trading rules vary across all supported markets. Always use the selected contract specification.

தொடர்புடைய சொற்கள்

Use the related-term links on this page to compare Theta with neighbouring definitions while retaining each term's distinct source, unit and limitations.

பரிந்துரைக்கப்பட்ட அடுத்த படிகள்

Open the related Derivatives terms below, then follow the matching Help Centre task guide and inspect Theta on an exact exchange listing. Confirm source, as-of time, units and unavailable reason before using it in research.

கல்வித் தகவல் மட்டும்; முதலீட்டு ஆலோசனையோ ஆர்டர் சேவையோ அல்ல.

This Theta tutorial is educational and descriptive. It is not investment advice, a price prediction, a recommendation, or an instruction to buy, sell, rebalance or place an order.