Stock-to-flow ratios are used to evaluate the current stock of a commodity (total amount currently available) against the flow of new production (amount mined that specific year).
For store of value (SoV) commodities like gold, platinum, or silver, a high ratio indicates that they are mostly not consumed in industrial applications. Instead, the majority is stored as a monetary hedge, thus driving up the stock-to-flow ratio.
A higher ratio indicates that the commodity is increasingly scarce - and therefore more valuable as a store of value.
On the above chart price is overlaid on top of the stock-to-flow ratio line. We can see that price has continued to follow the stock-to-flow of Bitcoin over time. The theory, therefore, suggests that we can project where price may go by observing the projected stock-to-flow line, which can be calculated as we know the approximate mining schedule of future Bitcoin mining.
The coloured dots on the price line of this chart show the number of days until the next Bitcoin halving (sometimes called 'halvening') event. This is an event where the reward for mining new blocks is halved, meaning miners receive 50% fewer bitcoins for verifying transactions. Bitcoin halvings are scheduled to occur every 210,000 blocks – roughly every four years – until the maximum supply of 21 million bitcoins has been generated by the network. That makes stock-to-flow ratio (scarcity) higher so in theory price should go up. This has held true previously in Bitcoin's history.
The stock-to-flow line on this chart incorporates a 365-day average into the model to smooth out the changes caused in the market by the halving events.
In addition to the main stock-to-flow chart, I have created a divergence chart (lower section of the chart) which shows the difference between price and stock-to-flow. When price moves above stock-to-flow (divergence line turns from green to red), thereby allowing us to easily see how price interacts with stock-to-flow through market cycles over time.
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