A 14.91% range and a -3.20% hour test the margin set on a rising week
Should a lender raise the collateral margin it requires on ETH-backed loans after this week's swings, or keep its terms and rely on the existing liquidation trigger?
The market facts are real; the decision maker is illustrative.
The week and the position
In the week of 11 August 2025, ETH rose 5.22% to close at 4,472.33, but inside a 14.91% range: a low of 4,166.77 on Monday, a high of 4,788.00 on Thursday, then the week's worst day of -4.26% and its largest hourly move of -3.20% both on Thursday. Annualised realised volatility reached 69.2%, dollar volume was 2.0 times the prior 12-week average, and the close sat in the middle third of the range. An illustrative lender accepts ETH as collateral and sells below a fixed trigger; funding stayed near flat at 0.0078% per eight hours.
Judgment
A rising week does not relax the requirement that a trigger can be met near its price. The Thursday hour shows collateral can lose 3.20% between candles, and the 14.91% range shows how far it can travel inside a single week. Raise the required margin on new ETH-backed loans and set it from the worst hour and worst day rather than the weekly average; leave existing loans on their original terms. Accept that some loans will need added collateral sooner under the new margin.
What would change it
If the lender's own liquidation records this week were filled close to the trigger price, the case for a higher margin weakens. If ETH's hourly and daily moves contract across several weeks while realised volatility falls well below 69.2%, the margin can be reviewed downward.
What sets this case apart
The trigger risk appears inside a gaining week, not a crashing one; the decision turns on intraday speed of loss, not on the weekly return.