The 500/500 Rule: Reading the Next Cycle Bottom Off the Halving Calendar
Three cycles in a row, Bitcoin's bear-market bottom has landed within a one-week band of the same number: about 500 days before the next halving. That's not a coincidence worth ignoring.
The halving is a protocol-level calendar event — no guessing required, it fires on schedule regardless of news or sentiment. That's exactly why it's a more reliable anchor than anything price- or narrative-driven.
What the last three cycles say
Line up each cycle's bottom against the halving that followed it:
- The 2015 bottom sat 511 days before the July 2016 halving.
- The late-2018 bottom sat 504 days before the May 2020 halving.
- The 2022 bottom sat 504 days before the April 2024 halving.
504, 504, 511 — three measurements, less than a week of spread between them. That kind of convergence across independent cycles is worth treating as a pattern, not dismissing as noise.
Projecting the next one
The next halving (around block height 1.1M) is estimated for Q1 2028, tentatively early April, though the exact date will drift slightly with network hash rate.
Running the 504-511 day window backward from that estimate lands the accumulation window on November 9-16, 2026. That's where the "500/500" name comes from: roughly 500 days of loading up before the halving, followed by roughly 500 days riding the move up to the next cycle top.
What this maps to, strategically
This is a framework, not trading advice:
- Now through November 9, 2026 — hold half in cash, keep dollar-cost-averaging the rest, don't chase.
- November 9-16, 2026 — deploy the remaining half in tranches. Modest leverage (2x, say) is fine here as a supplement once the core position is on, never as the primary tool.
The discipline stays the same regardless of the calendar math: no all-in bets, no chasing an exact bottom tick, tranches beat a single trade every time.
Where this breaks down
Three historical samples is a small base. A week or two of drift around the 500-day mark is well within normal noise, and this framework only tells you which direction to point your capital — not the exact hour to buy. The real confirmation still has to come from on-chain structure at the time: cost-basis lines, MVRV (market value to realized value), and VDD (value days destroyed) spikes lining up together. A calendar countdown alone isn't enough; it needs to converge with independent signals before it counts as confirmation.
"No exception in the historical record" doesn't guarantee this cycle follows the same script. Patience matters more than prediction.