> 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)
### 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)
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET 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?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.