market: The id of the market. Market ids use the following naming convention for options markets:
time: The time at which Coin Metrics queried the implied volatility data from an exchange in ISO 8601 date-time format. Always with nanoseconds precision.
database_time: The timestamp when the data was saved in the database in ISO 8601 date-time format with nanoseconds precision. Always with nanoseconds precision.
exchange_time: The timestamp reported by the exchange. Can be null if the exchange does not report a timestamp.
iv_bid: The implied volatility based on the last reported bid price
iv_ask: The implied volatility based on the last reported ask price.
iv_mark: The implied volatility based on the last reported mark price
iv_bidto zero if there are no bids on the order book and sets the
iv_askto zero if there are no asks. This can happen for options with very low liquidity.