AMZN
COST
Retail
AMZN ⇄ COST
99.80
-0.20% since 2026-08-23 · 7d +4.24%The store with no shelves against the one with a membership. Long is long Amazon and short Costco.
Index, 30 daily closes━ index · ━ AMZN alone · ┅ COST alone (rebased to 100)
Node not answeringPaper venuewaiting for a read
Mark (settled)99.7973
Spot index—
Last daily close105.7846
AMZN · COST$250.14 · $920.27
The slow clock here is the time-weighted mean of this page's own reads (up to 30 min); AmphiBook keeps the same mean on chain, updated on every poke.
Your paper positions
Connect a wallet to start a paper session with $10.00K of test USDG. Nothing is sent on chain.
The pair in numbers
30d realised vol23.5%
Correlation of the legs0.48
High · low105.78 · 99.40
1d · 7d · all+1.80% · +4.24% · +5.78%
Base day2026-08-23 · $258.60 / $949.45
Where each leg is priced
Skew and escrow, at any book
There is no shared book on the paper venue yet, so this is the formula, not a reading. Drag the open interest.
75% long25% short
Crowded side pays0.40 bp/h (35.0% a year)
Thin side is paid0.60 bp/h on its own OI
To the vault, per day$288.00
Vault escrow, net (at 3× margin)$1.13M vs $1.60M gross
How the mark, the cap and the skew work: two clocks · escrow · skew.