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Bitcoin 500-Day Rule Points to a New Buying Opportunity

The historic halving rule points to an accumulation phase in November, but spot Bitcoin ETFs and institutional inflows are making the old cycle harder to read.

By Zenz van der Wielen
• 2 min read
Bitcoin 500-Day Rule Points to a New Buying Opportunity

Key Takeaways

  • The 500-Day Rule suggests Bitcoin could enter another accumulation phase in late November.
  • The rule is based on the four-year halving cycle and historically strong returns in earlier cycles.
  • Spot Bitcoin ETFs and institutional demand make this cycle less predictable than earlier halving rounds.

A long-running Bitcoin rule is once again pointing to a possible buying window, but this cycle looks less straightforward than the ones before it. The so-called 500-Day Rule, which is tied to Bitcoin’s four-year halving rhythm, suggests the next accumulation phase could begin in late November. But with spot Bitcoin ETFs and institutional investors now in the mix, the old halving pattern is proving harder to rely on.

What the 500-Day Rule Says

The idea was brought into the spotlight in 2023 by Pantera Capital. Its basic premise is that Bitcoin has historically been a strong buy roughly 500 days before a halving and a potential sell roughly 500 days after one. In earlier cycles, that framework lined up with huge gains, including returns of as much as about 34 times the original investment. Pantera also said Bitcoin had historically formed a bottom 477 days before a halving, rallied into the event, and then climbed sharply afterward.

The halving is a built-in part of Bitcoin’s design that takes place every 210,000 blocks, or about once every four years. It cuts the reward for miners in half, which slows the pace of new Bitcoin entering circulation. Using the April 20, 2024 halving as the reference point, the next buying window under the rule would open in late November, while the next possible sell signal would not arrive until August 2029.

Why This Cycle Is Different

Even so, analysts say this cycle does not line up neatly with the old playbook. It is the first halving cycle to include U.S. spot Bitcoin ETFs, and those products have already changed how the market behaves. In some cases, daily ETF inflows can exceed the amount of new Bitcoin miners create, which means institutional demand now matters more than the halving-driven supply cut.

According to Jason Fernandes, co-founder of AdLunam, Bitcoin is now being driven mostly by institutions, and ETF inflows no longer offset the halving supply shock in the same way they once did. Mati Greenspan of Quantum Economics also says Wall Street now has a much bigger influence. Aryan Sheikhalian of CMT Digital goes a step further, saying the new supply from miners is tiny compared with spot Bitcoin ETFs and corporate U.S. Treasury flows.

What This Means for Investors

For European crypto readers, the takeaway is that Bitcoin has moved quickly from a mostly retail-driven cycle to one where ETF flows and institutional allocation can set the tone. The 500-Day Rule still offers a useful historical lens, but the current market setup may make past patterns less exact. That does not make the signal irrelevant, just less mechanical than it was in earlier halving rounds. Bitcoin also loses ground to stocks points to the same broader shift: the asset is increasingly trading in step with traditional markets instead of consistently outperforming them.

Disclaimer: This content is for informational purposes only and does not constitute financial, investment, legal, or tax advice. The information provided may be incomplete, inaccurate, or outdated and should not be relied upon as such. Nothing on this website should be considered a recommendation to buy, sell, or hold any cryptocurrency. Investing in crypto-assets involves risk of loss.