Inverse ETH Flexible Leverage Index (Polygon)



The Inverse ETH Flexible Leverage Index on Polygon lets you leverage a collateralized debt position in a safe and efficient way, by abstracting its management into a simple index. It enables market participants to take on leverage while minimizing the transaction costs and risks associated with maintaining collateralized debt. ETH-FLI-P targets a short -1x exposure to ETH and employs a flexible leverage mechanism for optimal rebalancing outcomes.


Market Cap


Current Supply

Streaming Fee
minting / Redeeming Fee

Underlying Tokens

USDC logo
WETH token - wrapped ETH logo
Debt & Collateral is accessed via



The Inverse ETH Flexible Leverage Index (iETH-FLI-P) makes leverage effortless. The end user does not have to worry about:

Monitoring their leveraged loan 24/7, having to always be ready to act.
High fees, transactions not being included fast enough or the relative UIs being unresponsive during times of high volatility.
Users don't have to manage their liquidation ratio since this is automatically managed by FLI, which drastically reduces liquidations, even during black swan events.

iETH-FLI-P has several key advantages over Legacy Leveraged Tokens:

Zero slippage via composable entry and exit.
Unique index algorithm reduce rebalancing needs by an order of magnitude.
Emergency deleveraging possible during Black Swan events for additional fund safety.

Initial Parameters

Underlying Asset: USDC
Borrow Asset: WETH
Target Leverage Ratio: -1.0 (short)
DeFi Lending Protocol: Aave Polygon
Maximum Leverage Ratio: -1.2 (short)
Minimum Leverage Ratio: -0.8 (short)
Rebalance Interval: 4 hours
Recentering Speed: 2.5%


Borrow Rate — the cost to borrow the asset at the DeFi Lending Protocol over the most recent epoch.
Epoch Length — the time between rebalances.
Target Leverage Ratio (TLR) — the long term target for the value of the assets held by the index divided by the value of the debt held by the index.
Current Leverage Ratio (CLR) — the value of the asset currently held by the index divided by the current value of the debt held by the index.
Maximum Leverage Ratio (MAXLR) — the highest leverage ratio the index will ever have after a rebalance.
Re-centering Speed (RS) — the rate at which the Current Leverage Ratio is adjusted each period to return to the Target Leverage Ratio, when the index is not being adjusted back to the Maximum Leverage Ratio or the Minimum Leverage Ratio.

Index Price:

FLIt = FLIt-1 * (1 + ((Pricet/Pricet-1–1) * CLRt-1 — (BorrowRatet * (CLRt-1 -1)/CLRt-1)))

Calculation of the new Current Lever Ratio for the period:

FLIt = FLIt-1 * (1 + ((Pricet/Pricet-1–1) * CLRt-1 — (BorrowRatet * (CLRt-1 -1)/CLRt-1)))
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