Tobin Tax
Version 1.0.0 · Updated 2026-07-30
CORE DEFINITION
A uniform, low-rate transaction tax on spot foreign exchange transactions. Its purpose is to increase the cost of short-term speculation (like throwing sand in the wheels of a fast-spinning wheel) to curb excessive volatility in financial markets without hindering long-term investment.
SCAFFOLDING EFFECT
Reduce cognitive load
- Friction design: For system stability, it is sometimes necessary to artificially increase 'transaction costs'. For example, if internal transfers within a company are too easy, it can lead to departmental instability; setting a bit of a 'Tobin tax' (such as an interview threshold) can filter out those who truly want to transfer.
Anchor fast decisions
James Tobin proposed imposing a very low tax rate (e.g., 0.1% to 0.5%) on spot foreign exchange transactions to 'throw sand in the wheels' of high-speed speculation—slightly increasing transaction costs can curb short-term trading and excessive volatility without impeding long-term investment. It embodies the idea of 'using small frictions for system stability': appropriate friction can filter out noise trading.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Tobin_taxverified
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