Session-aware lending · stock tokens · Robinhood Chain

Borrow against your stocks after the bell.

Stock tokens trade around the clock, but their prices only really move when NYSE is open. Vesper lends USDG against them with rules built for the hours when prices sleep: no liquidations on stale quotes, limits priced for the next gap, and a reserve paid for by the risk it covers.

Exchange
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AssetOracleAfter-hoursImplied gapLimit now
The problem

Prices sleep at 4 PM.

NYSE is closed about 81% of the week. A lending protocol built for 24/7 crypto treats those hours like any others — and that's where borrowers and lenders get hurt.

01 · Stale oracle

The quote stops, the world doesn't

After the close, the official price freezes while news keeps arriving. A loan looks healthy at a price that no longer exists.

02 · Thin after-hours

Liquidated at 3 AM on a thin book

Liquidating on after-hours DEX quotes means selling collateral into almost no liquidity, at prices one trade can move.

03 · The gap

Monday opens somewhere else

The opening print can land several percent away from Friday's close. Loans priced for normal volatility can go underwater in a single print.

Mechanism

Three rules for the night.

i.

The oracle sleeps with the exchange

Collateral is valued on regular-session prints only. While NYSE is closed nothing is liquidated; the first check is the opening print.

liquidate only if oracle.live && HF < 1
ii.

Limits priced for the next gap

Your borrow limit is what survives the closure ahead at 3σ. It's lower before a weekend and rises as Monday's open gets closer.

maxLTV = LT · e^(−3 · 1.3 · σ_gap(H))
iii.

Night premium funds the Gap Reserve

Borrowers pay an extra rate only while the exchange is closed. It flows into the reserve that covers bad debt when a gap jumps past a liquidation.

rate = base(U) + night · 1[closed]

NVDA · last 6 days

oracleafter-hoursclosed

Green and red bars mark opening gaps: the jump from the last close to the next opening print.

Borrow limit by closure ahead

AssetOvernightWeekendNowLiq. at

Same rule, different exposure: a loan opened on Friday afternoon has to survive 65.5 hours without a price; one opened on Sunday night only a few.

USDG supplied
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Borrowed
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Utilization
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Supply APR
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Gap Reserve
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Pool figures are not live yet.

$VSPR
Stake to back the Gap Reserve and earn the night premium. Hold to pay less of it.
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