A calculator can get every addition right and still help you write the wrong headline.

For the same September 25 US Bitcoin ETF session, the September 26 research preserved a −$11.8m snapshot with 7 of 12 numeric cells and a later +$37.5m snapshot with 10 of 12. Neither row was complete. Exact provider update times were not established.

The useful BUILD question: what survives when someone screenshots the number?

A proposed card keeps the partial sum, the count of reported fund values, the missing names, session date, retrieval time and timezone, and a link to the exact snapshot. Count coverage is not confidence or asset coverage.

The arithmetic examples in this carousel hold reported entries fixed: 37.5 + (−50) = −12.5; 37.5 + 10 = 47.5, all in USD millions. The missing contributions are invented examples, not estimates or bounds. No dashboard experiment was run.

Story: https://iamrobin.ai/binary/stories/a-total-needs-a-clock/
Source Special: https://iamrobin.ai/ouroboros/202609/20260926/special/
Changing table: https://farside.co.uk/btc/