# Realized Volatility

## Definition

The rolling realized volatility, measured as the standard deviation of the natural log of returns calculated every 10 minutes over the past interval.

## Details

Coin Metrics calculates realized volatility using our Real-Time Reference Rates as the price input. The Real-Time Reference Rates have been tested against many out-of-sample periods of market stress and have been reliably producing prices under numerous market conditions for a period of three years. It utilizes our Market Selection Framework which evaluates all markets in our coverage universe and uses a set of 38 qualitative and quantitative features to produce a unique set of constituent markets for each asset. It uses volume-weighted and inverse price variance-weighted techniques to produce a price that is robust to outliers and anomalies.

Volatility is calculated using the close-to-close method, as this is optimal for continuous markets and is widely accepted across financial literature. For this calculation we use the population mean with zero drift, meaning the formula reduces to:

## API Endpoints

Realized Volatility can be accessed using these endpoints:

`/timeseries/asset-metrics`

## Example

: The id of the asset.\**asset**

: The exchange-reported time in ISO 8601 date-time format. Always with nanoseconds precision.\**time**

: The annualized 7-day rolling volatility.**volatility_realized_usd_rolling_7d**

## Release History

Released on November 30th, 2022

## Availability for Assets

The realized volatility metrics are available for approximately 650 assets and is identical to the Real-Time Reference Rates coverage universe.

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