> For the complete documentation index, see [llms.txt](https://docs.bundles.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bundles.fi/performance/mint-and-burn-fee.md).
# Mint & Burn fee
Each bundle incurs mint and burn fees (up to 2.5%), paid exclusively in the bundle's underlying tokens—the assets that form the index. These fees accrue to existing holders, increasing their proportional share of bundle tokens. Whenever a user mints or burns a bundle index token, holders earn a share of those fees, effectively growing their bundle token holdings without additional investment.
Mint CORE index token by depositing its underlying tokens
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