Market Cap history for individual currencies

Hi There - I’m trying to compile historical market caps for individual currencies for our indices, - which i’d like to migrate to your data feed.

The supplies interval data seems a bit light on history and has some gaps. However, I see you calculate the Total Market Cap for all crypto assets which has a much longer track record.

Can you help me understand the difference in data availability?

You’re right that the supply information only has a limited history. When we calculate market cap, we use the closest supply and price to a given day. So, for long term history our market caps are using the oldest supply we have. This may have some drift, depending on the supply schedules for individual coins.