Bitcoin Gains 7% in September, Breaking a Decade-Long Pattern of 'Positive August Followed by Negative September'
nashnova research
Bitcoin has gained roughly 7% this month, on track to snap a streak dating to 2013 in which every positive August was followed by a negative September; whether Q4 extends that momentum hinges on U.S. 10-year yields above 5.2% and a stack of macro headwinds.
What exactly is this "iron rule"?
Since 2013, every time Bitcoin finished August in the green, September ended in the red — no exceptions for over a decade.
This August, Bitcoin rallied 25%; history said September should fall. With only two trading days left, the month is up roughly 7%.
This means → a positive close would officially end that ten-year negative-correlation streak.
How impressive is this in the bigger picture?
A green September would give Bitcoin three consecutive monthly gains from July through September, with Q3 up more than 40%.
That would be the first positive quarter since Q3 2025.
At the time of reporting, Bitcoin traded at $84,000.
What does history say about Q4?
According to crypto data platform CoinGlass, Q4 is historically Bitcoin's strongest quarter, averaging gains of roughly 77%.
In plain terms = if you only look at the past, Q4 is Bitcoin's "peak season."
But a historical average is not a guarantee — today's macro backdrop looks nothing like prior years.
How heavy is the macro pressure?
The U.S. 10-year Treasury yield has climbed above 5.2%; the MOVE index — a gauge of bond-market volatility — has topped 100, near its year-to-date high.
This means → with the risk-free rate this elevated, the pull of bonds is strong, and the appeal of risk assets — Bitcoin included — gets compressed.
Oil holds above $90 a barrel, stoking inflation fears; gold fell roughly 3% on Monday, trading above $4,000 an ounce — even traditional safe havens are under strain.
What other disruptions loom in Q4?
Anthropic is reportedly planning a November IPO; if it proceeds, it could divert significant investor capital toward the new listing — though the timeline and size are not yet finalized.
U.S. midterm elections in November may inject policy uncertainty, amplifying market swings.
In plain terms = one risk is "money gets pulled toward a different big event," the other is "no one can read the policy direction" — together, they could tighten liquidity in stretches.
What does breaking the pattern actually tell us?
The end of the streak is a structural signal: current buying pressure is stronger than the seasonal selling inertia of the past decade.
But a signal ≠ a trend — whether Q4 carries forward depends on the path of macro rates and risk appetite.
This reflects a market caught in a tug-of-war between "seasonal tailwinds" and "macro headwinds," with direction still unclear.
市场有风险，内容仅供研究参考，不构成投资建议。