BTC: Daily Quote - Mean Since 17 December 2017

Bitcoin Daily Quote - Mean Since 17 December 2017 was $40,690.36 on 7 Nov 2026 (latest daily value).

The average of Bitcoin's daily closes since the 2017 top (17 December 2017), up to each day.

Why use it. A baseline anchored at that cycle's peak. How to read it. Compare the price with the average of every close since that top.

Calculation. Exact definition: The cumulative mean of admitted daily closing BTC/USD quotes from UTC day 2017-12-17 through each later day. Each point weights every daily quote since the anchor day equally; there are no values before 2017-12-17. An interior missing quote leaves all later values undefined. Day D uses the following 00:00 UTC quote; earlier quotes are retrospective closes with unknown publication time, venue and vintage, later ones keep their actual clocks, values are provisional and revisable, and the open day is a labelled partial. cumsum(a if a > 0, otherwise undefined) / cumsum(1), starting at UTC day 2017-12-17 (Unix time 1513468800), whose exact quote is required: the running sum of each day's positive admitted ending-boundary BTC/USD quote divided by the running count of days. Uses existing 40-digit Decimal arithmetic.