A 6.22% Saturday hour and a lower-third close probe a liquidation trigger set on weekdays
Should the lender reset its ETH collateral margin and liquidation hours now, or keep the terms set when ETH moves were smaller and weekday liquidity was deeper?
The market facts are real; the decision maker is illustrative.
The week and the position
In the week of 6 August 2018, ETH fell 22.23%, from 408.77 to 317.89, closing in the lower third of the week range (close_location_pct 12.3) with volume above its prior 12-week average. The low of 304.45 came Saturday 16:00 UTC, and the largest 1h move, 6.22%, followed one hour later, late in the UTC day. ETH also fell 13.41% against BTC, with hourly correlation to BTC at 0.85, and sat 72.58% below its 52-week high. An illustrative lender liquidates ETH collateral below a fixed trigger.
Judgment
The largest 1h move of the week, 6.22%, arrived after Saturday's low, late in the UTC day, so a fixed trigger calibrated on ordinary weekday hours can be crossed within one hour when price is already at the week's bottom. Raise the required ETH margin relative to BTC, using the 6.22% hour and the 8.65% worst day rather than the weekly average, and extend liquidation coverage across weekend hours. Existing loans keep their terms; new loans use the higher margin and the wider hours. The lender accepts slower loan growth for coverage of gap-throughs.
What would change it
If liquidation records show weekend fills landing close to the trigger price this week, the higher margin weakens. If ETH's late-day and weekend 1h moves stay below the weekly 6.22% for several weeks, the margin and hours can be reviewed.
What sets this case apart
Unlike a pure margin-sizing case, this one turns on when the worst hour came: a weekend, late-UTC move against a trigger calibrated on ordinary weekday hours.