Bitcoin Overnight Seasonality and a Two-Hour Long Strategy

Summary

The document examines hourly Bitcoin returns and reports that the distribution is uneven, with the strongest economically meaningful positive returns occurring at 22:00 and 23:00 UTC. It proposes a simple seasonality rule: buy Bitcoin at 22:00 UTC and close the position two hours later. The cited study uses Bitcoin data from Gemini and reports that some positive hourly returns are statistically significant at the 5% level, while negative returns are described as insignificant.

The suggested explanation is that these hours overlap with closures of major stock exchanges, potentially concentrating trading demand in Bitcoin. The document presents this as a possible mechanism rather than a demonstrated cause. It also cautions that the long-only strategy does not serve well as a stock hedge during bear markets and that cryptocurrencies are risky in periods of uncertainty. The result is a narrow intraday pattern from a cited study, not evidence that the effect is persistent or generalizes across venues and market conditions.

Key ideas

• Hourly Bitcoin returns are reported to vary rather than distribute uniformly through the day.
• The proposed rule enters long at 22:00 UTC and exits two hours later.
• Returns at 22:00 and 23:00 UTC are highlighted as economically meaningful and statistically significant in the cited analysis.
• The closure of major exchanges is offered as a possible explanation for the pattern.
• The strategy is long-only and is not presented as a reliable hedge during equity bear markets.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.