> ## Documentation Index
> Fetch the complete documentation index at: https://docs.amberdata.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Term Structure Constant

# Definition

The **Term Structure Constant** endpoint displays the at-the-money (ATM) implied volatility for fixed, standardized maturities, regardless of the actual expiration dates of the options for ETFs and crypto-related equities. This standardization allows for consistent comparisons across different assets and time horizons.

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# Details

* Displays at-the-money (ATM) implied volatility for fixed, standardized time-to-expiration (DTE) values, such as 30 days, 60 days, 90 days, and more.
* Enables standardized comparisons of volatility across different time horizons, as the maturities remain constant regardless of actual expiration dates.
* Useful for analyzing the overall term structure of implied volatility and identifying potential mispricing or arbitrage opportunities in ETFs and crypto-related equities options markets.

# API Endpoints

[/TradFi Term Structures Constant](/http/analytics/derivatives/tradfi-term-structures-constant)

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# Availability

| Coverage                                                                     | Start Date | Granularity |
| ---------------------------------------------------------------------------- | ---------- | ----------- |
| BITX, BITO, COIN, EETH, ETHU, MARA, MSTR, MSTU, SATO, IBIT, SBET, BMNR, ETHA | 2024-11-01 | 5 min       |
| BITX, BITO, COIN, EETH, ETHU, MARA, MSTR, MSTU, SATO, IBIT, SBET, BMNR, ETHA | 2021-12-01 | Daily       |

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