# Inverse BTC Flexible Leverage Index (iBTC-FLI-P)

<div align="left"><img src="https://2404196717-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MJY-enmfAw5ra2s-8QX%2Fuploads%2FeW7Y1y1fun3C0dEXeRGC%2FiBTC-FLI-P_pulse_red.png?alt=media&#x26;token=1d39927a-009b-41f0-9143-413e867b28a4" alt="" width="188"></div>

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

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

### What is the methodology behind iBTC-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-ibtcfli) or [scalara.xyz/indices?id=fli](https://www.scalara.xyz/indices?id=fli).

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

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

### FLI Resources

* Launch Article: [Introducing the 2x and Inverse BTC FLIs on Polygon](https://indexcoop.com/blog/btc2x-fli-ibtc-polygon)
* Token Contract Address (Polygon): [0x130cE4E4F76c2265f94a961D70618562de0bb8d2](https://polygonscan.com/token/0x130ce4e4f76c2265f94a961d70618562de0bb8d2)
* 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)