# Stock to Flow Ratio ## Indicator Overview The Stock to Flow (S/F) Ratio is a popular model that assumes that scarcity drives value. It is defined as the ratio of the current stock of a commodity and the flow of new production, and is applied across many asset classes. Bitcoin's price has historically followed the S/F Ratio, making it a popular model for predicting future Bitcoin valuations.
Bitcoin: Stock to Flow Ratio
* [View Stock to Flow Ratio in Glassnode Studio](https://studio.glassnode.com/metrics?a=BTC\&m=indicators.StockToFlowRatio) * [View Stock to Flow Ratio in Glassnode API Docs](https://docs.glassnode.com/basic-api/endpoints/indicators#stock-to-flow-ratio) ## How is it measured? Stock to Flow is defined as the ratio of the current stock of a commodity (i.e. circulating Bitcoin supply) and the flow of new production (i.e. newly mined bitcoins). ## About ### Introduced By [PlanB](https://twitter.com/100trillionUSD) ### Date Introduced January 2019 ## Further Resources PlanB - [Modeling Bitcoin's Value with Scarcity](https://medium.com/@100trillionUSD/modeling-bitcoins-value-with-scarcity-91fa0fc03e25) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.glassnode.com/guides-and-tutorials/metric-guides/stock-to-flow/stock-to-flow-ratio.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.