> For the complete documentation index, see [llms.txt](https://docs.indexcoop.com/index-coop-community-handbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.indexcoop.com/index-coop-community-handbook/products/legacy-products/flexible-leverage-index-polygon-fli-ps/inverse-eth-flexible-leverage-index-ieth-fli-p.md).

# Inverse ETH Flexible Leverage Index (iETH-FLI-P)

<div align="left"><img src="/files/oMgGFNqeSbhv2lLzojBE" alt="" width="188"></div>

### What is the Inverse ETH Flexible Leverage Index?

The Inverse ETH Flexible Leverage Index on Polygon abstracts collateralized debt management into a simple index, reproducible by an ERC20 token built on Set Protocol. iETH-FLI-P enables you to get inverse exposure to ETH using collateralized debt, without having to manage collateralized debt positions or monitor liquidation risks. iETH-FLI-P targets a short -1x exposure to ETH and employs a flexible leverage mechanism for optimal rebalancing outcomes.

### What is the methodology behind iETH-FLI-P?

The methodologist behind the FLI is Scalara, formerly known as Pulse, Inc (or DeFi Pulse).

You can find the methodology for FLI on the [Index Coop site](https://indexcoop.com/polygon-inverse-imaticfli) or [scalara.xyz/indices?id=fli](https://www.scalara.xyz/indices?id=fli).

### Where can I buy iETH-FLI-P?

* Index Coop website: [iETH-FLI-P](https://indexcoop.com/polygon-inverse-iethfli)
* Slingshot (DEX Aggregator): [iETH-FLI-P](https://app.slingshot.finance/trade/m/IETH-FLI-P)
* TokenSets (Mint and Redeem): [iETH-FLI-P](https://www.tokensets.com/portfolio/polygon/ieth-fli-p)

### FLI Resources

* Launch Article: [Introducing the Inverse ETH Flexible Leverage Index](https://medium.com/indexcoop/introducing-the-inverse-eth-flexible-leverage-index-72503b108d11)
* Token Contract Address (Polygon): [0x4f025829C4B13dF652f38Abd2AB901185fF1e609](https://polygonscan.com/address/0x4f025829c4b13df652f38abd2ab901185ff1e609)
* Medium: [Understanding the Risks of Owning FLI Tokens](https://medium.com/indexcoop/understanding-the-risks-of-owning-fli-tokens-cd0468843496)
* Medium: [How Volatility Drift Affects FLI Products](https://medium.com/indexcoop/how-volatility-decay-affects-fli-products-a10f94977da5)
* Medium: [Everything You Need to Know About FLI Product Parameters](https://medium.com/indexcoop/everything-you-need-to-know-about-fli-product-parameters-56dc2c26b0ab)

### Learn More

* TokenSets - [FAQs](https://help.tokensets.com/en/articles/5049454-eth2x-fli-faqs)
* CoinGecko Research
  * [Part 1: Introduction to Crypto Leveraged ETF](https://www.coingecko.com/buzz/part-1-introduction-to-crypto-leveraged-etf)
  * [Part 2: Deep Dive into Decentralized Leveraged ETFs](https://www.coingecko.com/buzz/part-2-deep-dive-into-decentralized-leveraged-etfs)
* Index Coop: [Introducing the Flexible Leverage Index (FLI), by Pulse Inc](https://medium.com/indexcoop/introducing-the-flexible-leverage-index-fli-by-pulse-inc-a369bd422ef)
* Pulse Inc: [Introducing the Flexible Leverage Index](https://pulseinc.medium.com/introducing-the-flexible-leverage-index-5ec90f2381ce)
* View from the Nest \[starts at 18:35] - [Audio interview with Scott Lewis of DeFi Pulse](https://indexcoop.substack.com/p/view-from-the-nest-podcast-4)