> For the complete documentation index, see [llms.txt](https://docs.glassnode.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.glassnode.com/further-information/metric-guides/stock-to-flow/stock-to-flow-deflection.md).
# Stock to Flow Deflection
## Indicator Overview
The Stock to Flow (S/F) Deflection is the ratio between the current price of an asset and its [Stock to Flow Ratio](/further-information/metric-guides/stock-to-flow/stock-to-flow-ratio.md). It is used to determine whether an asset is overvalued or undervalued in relation to its scarcity.
If deflection is ≥ 1 it means that the asset is overvalued according to the S/F model. If deflection is <1, the asset is undervalued according to this model.
* [View Stock to Flow Deflection in Glassnode Studio](https://studio.glassnode.com/metrics?a=BTC\&m=indicators.StockToFlowDeflection)
* [View Stock to Flow Deflection in Glassnode API Docs](https://docs.glassnode.com/basic-api/endpoints/indicators#stock-to-flow-deflection)
## How is it measured?
The Stock to Flow Deflection of an asset represents the ratio between the price of the asset and its Stock to Flow Ratio (itself defined as the ratio of the current stock of the asset and the flow of new production).
## 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)
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