Bitcoin stock-to-flow model explained as price hovers near $73,600

Bitcoin is trading near $73,600, a 15.8% decline year‑to‑date, as investors reference the stock‑to‑flow (S2F) model that links Bitcoin’s capped supply to its price outlook [2].

How the S2F model works

The S2F model measures scarcity by dividing the existing “stock” of Bitcoin (the total coins already mined) by the “flow” of new coins created each year. With a hard cap of 21 million coins, Bitcoin’s flow drops sharply every four years during halving events, which cut the block reward in half. A higher stock‑to‑flow ratio signals greater scarcity, which the model translates into higher price targets [3].

Context and limits

Bitcoin’s price peak of $92,559 in January 2026 sits well above its current level, illustrating the volatility that the S2F model tries to smooth. Critics note that the model, originally designed for commodities like gold, does not account for demand shocks, regulatory news, or macro‑economic factors that have driven Bitcoin’s recent 30%‑plus annual decline [2]. Moreover, the model’s forecasts have missed several market cycles, underscoring that it is a hypothesis rather than a proven predictor.

What to watch

• Next halving impact – The upcoming halving in 2028 will halve the annual flow again, potentially pushing the S2F ratio above 100.
• Regulatory signals – Any SEC decision on a Bitcoin ETF could shift demand independent of scarcity metrics.
• Price thresholds – Watch the $70,000 support level and the $78,000 resistance zone for short‑term momentum.

The S2F model highlights Bitcoin’s built‑in scarcity, but its predictive power remains contested. As price hovers near $73,600, the debate over whether scarcity alone can drive value continues, leaving investors to monitor both on‑chain supply dynamics and external market catalysts.