# Auctions

Part of the yield from the LST collateral goes to the vaults, and a part goes to the RoeUSD savings pool. This yield is deposited in the pool and a dutch auction starts.

The dutch auction bonus goes up 1% every 30 minutes, up to 50%.

<figure><img src="https://341049535-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FF6y9fWq2rB5VvMDmXZ9B%2Fuploads%2FYCRLDo69Av7WN78ei5JT%2Fimage.png?alt=media&#x26;token=1fd065c8-700e-494b-9530-cb869a59d7b2" alt=""><figcaption></figcaption></figure>

In the above example, there is some collateral available for purchase. The discount bonus is now 50%, which means anyone can buy 0.034 STONE for half its oracle price.

The auction starts when yield is perceived. Monroe works with LSTs that receive yield once per day.