Reading TVL — and what TVL does not measure
DeFi's most quoted metric, decomposed into its two moving parts.
This lesson has had no expert review. It was written for this platform and against the evidence it cites; nobody has gone through it independently.
Learning objectives
- You can define TVL, compute it, and decompose it into quantity and price.
- You can name the additional data that makes a change in TVL interpretable at all.
Check your prior knowledge
Answer these for yourself before reading on. Wherever you hesitate is where this lesson pays off.
- What does “deposited” mean in a pool?
- What does the USD value of a deposited quantity depend on?
- Is deposited capital the same as tradable depth?
Core concept
Two moving parts
TVL is the sum of all deposited quantities, each valued at its current price. TVL therefore moves for two reasons: because the deposited quantity changes, or because the price changes. A TVL figure alone never says which of the two applies.
Deposited is not tradable
TVL measures how much capital is committed to a mechanism — not how much of it could be sold at a given price in the short term. In a lending market much of it may be lent out; in an AMM the liquidity spreads across price ranges of which only part is effective at the current price.
The most common fallacy
“High TVL, therefore trustworthy” is not a valid inference. TVL measures capital, not safety: capital follows incentives and leaves just as fast. A rise can reflect durable capital formation, a time-limited incentive payment, leverage, or simply a price increase. Which of those applies is a separate investigation.
Definitions
- TVL in the glossary
- The USD value of all assets deposited at a point in time.
- Tradable depth
- The amount tradable without material price impact.
Model
Observe the change in TVL
Strip out the price effect
Check the quantity effect against utilization and usage
Check incentive programs as a possible explanation
Formulate the statement — including the question that stays open
Formulas
TVL
TVL = Σ (quantity_i × price_i)- quantity_i
- deposited units of asset i
- price_i
- current USD price of asset i
Limit: The formula says nothing about availability: the same TVL can be entirely lent out or entirely free.
Decomposing a change in TVL
ΔTVL ≈ (Δquantity × price_old) + (quantity_new × Δprice)- Δquantity
- change in deposited units
- Δprice
- change in price
Limit: An approximation: when both change at once the cross term cannot be attributed uniquely. It still suffices for the question “quantity or price?”.
Worked example
A 40 % TVL rise, decomposed
- TVL before
- USD 250m
- TVL after
- USD 350m
- Price of the main collateral
- +32 %
- Share of that collateral in TVL
- 80 %
Price effect ≈ 250 × 0.8 × 0.32 = USD 64m. Total rise USD 100m. Remaining quantity effect ≈ USD 36m.
Roughly two thirds of the rise is price effect, roughly one third newly deposited capital.
Reading: The headline “TVL +40 %” mostly describes a price move. The reportable part is the USD 36m — and the question of why it came.
Retrieval
Exercise on real data
Pick a market with a visible TVL history. Check whether a notable move coincides with a price move in the deposited assets — and record what the available data does not let you decide.
View a market's TVL history →Application
Word the example's observation so that observation, interpretation and open question stay separate.
Related case studies
Institutional reading
- Bank
- How should this decomposition be documented in a risk report so it stays auditable?
- Asset management
- What position size does the observed TVL permit without the position itself moving the market?
Metrics in this lesson
Key takeaways
- TVL has two drivers — quantity and price. Without separating them, a change is not interpretable.
- TVL is a stock, not tradable depth.
- High TVL is not a safety property.
Evidence
- EVD-2026-0008
DeFiLlama — DeFiLlama yields endpoint (/pools)