Why bitcoin’s ‘500-day rule’ faces its biggest test yet

MarketsWhy bitcoin’s ‘500-day rule’ faces its biggest test yetThe so-called ‘500-day rule’ says buying BTC roughly 500 days before a bitcoin halving and selling it about 500 days after would have produced profits in prior cycles.By Olivier Acuna|Edited by Stephen Alpher, Aoyon Ashraf Aug 5, 2026, 9:06 a.m. 3 min readMake preferred on ShareShare this articleCopy linkX iconX (Twitter)LinkedInFacebookEmailMake preferred on SummaryShowA once-lucrative bitcoin trading strategy known as the 500-day rule, tied to the cryptocurrency’s four-year halving cycle, is signaling a buying window opens in late November and a potential exit around mid-August 2029.Analysts warn that this cycle may differ from past ones because U.S. spot bitcoin ETFs and institutional flows now dwarf new supply from miners, potentially weakening the halving’s impact on prices.While some market participants argue that the traditional halving-driven four-year cycle is fading, others say miner economics still anchor bitcoin’s long-term market structure, even if the 500-day rule proves less precise as a trading signal.A historically profitable bitcoin BTC$64,126.82 trading rule, built around the cryptocurrency's four-year halving cycle, is pointing toward another potential buying opportunity. But this time around, the pattern might not work as well as before, as spot bitcoin ETFs and institutional investors influence the market more than ever before.The "500-Day Rule," popularized by Pantera Capital in 2023, suggested that investors would historically have profited by buying bitcoin roughly 500 days before the halving and selling about 500 days afterward. The trading strategy, which has historically generated returns of up to roughly 34 times an investor’s original stake, revolves around bitcoin’s previous boom-and-bust cycles, in which reductions in newly mined supply were followed by sharp price gains.“Bitcoin has historically bottomed 477 days prior to the halving, climbed leading into it, and then e…

Why bitcoin’s ‘500-day rule’ faces its biggest test yet

Coins in this story

Discussion

Related stories

The worst chart for bitcoin bulls right now

Bitcoin flat at $64,000 as stocks print records and Hormuz deal nears

Coldcard hack sparks a self-custody security overhaul: Cory Klippsten