Books and tiers

A book is one stock, one oracle, and one risk tier against the shared USDG pool. Values below come from mock parameters and LaunchParams (no RPC).

This table is generated at build from mock parameters and LaunchParams (no RPC). It is not typed by hand.

Three risk tiers: index books borrow more, mega-cap books sit in the middle, high-beta books borrow less.

A listing is a book. The book binds a stock token, an oracle, a tier, a borrow cap, and a borrowingEnabled flag to the shared USDG pool. Identity fields never change after createBook. Risk numbers move only through the timelock. Tier A is the index pair SPY and QQQ. Tier B is mega-cap names. Tier C is high-beta names. The app copy says borrow up to half as a simple guide. Exact LTV sits in this table and on Parameters.

Book	Tier	LTV	LT	Max discount	Oracle	Borrowing
SPY S&P 500 ETF	A	70%	77%	5%	n/a	off
QQQ Nasdaq 100 ETF	A	70%	77%	5%	n/a	off
AAPL Apple	B	55%	70%	6%	n/a	off
MSFT Microsoft	B	55%	70%	6%	n/a	off
GOOGL Alphabet	B	55%	70%	6%	n/a	off
AMZN Amazon	B	55%	70%	6%	n/a	off
META Meta	B	55%	70%	6%	n/a	off
NVDA NVIDIA	C	45%	60%	8%	n/a	off
TSLA Tesla	C	45%	60%	8%	n/a	off
AMD AMD	C	45%	60%	8%	n/a	off
NFLX Netflix	C	45%	60%	8%	n/a	off
PLTR Palantir	C	45%	60%	8%	n/a	off

Identity fields (collateral, oracle, issuer) never change after createBook. LTV, LT, discount, cap, and borrowingEnabled move only through the timelock. Related: The line and the cushion, Parameters, Oracle.

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