Spark is Sky's lending market, the open credit line of the balance sheet that has backed DAI since 2019: deposit and it earns from the block it lands, post collateral and the market lends against it, and the stablecoin borrow rate is published by governance ahead of time rather than set by whoever panicked last.

It runs the same over-collateralized machinery that has held the rest of lending together for years, an Aave v3 lineage with public loan-to-values, published liquidation lines, and one oracle pricing everyone alike, and behind it sits something no fork can copy: a direct liquidity line from Sky itself, so the borrow side is fed by the balance sheet that mints the stablecoin rather than by depositors who can leave. Billions sit in it because the terms are mechanical and the depth is structural.

None of that predictability transfers to the person holding the position. The stablecoin rate is calm; the collateral is not. ETH still moves eight percent while you sleep, the health factor still decays one block at a time, the leverage loop is still a dozen transactions pretending to be one decision, and a governance vote can still reprice the borrow you sized last month. The market keeps its rules every block. You keep yours only while you are awake.

Every number Spark keeps about a position is a step in a plug: the price of each asset, the loan-to-value assigned to it, the liquidation line, the remaining borrow capacity, the health factor, and any one of them can decide what happens next. Supply, borrow, repay, withdraw, flash loans, collateral and E-Mode switches fire when a condition is met rather than when a person is awake.

Debt that pays itself down when the health factor touches the line you set. Collateral pulled in from an idle balance before the market can test the position. A loop opened, resized, or unwound in one atomic transaction. A stablecoin borrow that closes when governance moves the rate past your number.

The positions that compound quietly on Spark are already run by rule, and the gap between a managed position and a merely open one only shows itself at the worst possible hour.