# asset_publish_feed_operation¶

Publish price feeds for market-issued assets.

Price feed providers use this operation to publish their price feeds for market-issued assets. A price feed is used to tune the market for a particular market-issued asset. For each value in the feed, the median across all committee_member feeds for that asset is calculated and the market for the asset is configured with the median of that value.

The feed in the operation contains three prices: a call price limit, a short price limit, and a settlement price. The call limit price is structured as (collateral asset) / (debt asset) and the short limit price is structured as (asset for sale) / (collateral asset). Note that the asset IDs are opposite to eachother, so if we're publishing a feed for USD, the call limit price will be ECHO/USD and the short limit price will be USD/ECHO. The settlement price may be flipped either direction, as long as it is a ratio between the market-issued asset and its collateral.

• fee paid for by publisher.
• asset_id asset for which the feed is published.

### JSON Example¶

[
19,{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"publisher": "1.2.0",
"asset_id": "1.3.0",
"feed": {
"settlement_price": {
"base": {
"amount": 0,
"asset_id": "1.3.0"
},
"quote": {
"amount": 0,
"asset_id": "1.3.0"
}
},
"maintenance_collateral_ratio": 1750,
"maximum_short_squeeze_ratio": 1500,
"core_exchange_rate": {
"base": {
"amount": 0,
"asset_id": "1.3.0"
},
"quote": {
"amount": 0,
"asset_id": "1.3.0"
}
}
},
"extensions": []
}
]