BASEBOOK

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BASEBOOK is a front end for leveraged perpetuals on Gains Network, settled in USDC on Base. It is non-custodial: you sign every transaction from your own wallet, and BASEBOOK never holds keys or funds.

Getting started

Two things need to be in the wallet you connect, both on Base:

• USDC, which is the collateral. The contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Pick USDC from your wallet's token list; never paste a token contract address into a recipient field, because tokens sent to a contract address are unrecoverable.
• A little ETH for gas. Base fees are fractions of a cent, so a dollar covers hundreds of transactions. USDC cannot move on its own without it.

How much USDC depends on the market, because Gains enforces a minimum position size per pair and caps leverage per pair. The cheapest positions to open are the crypto pairs; equities need more collateral because their leverage caps are lower. The table below gives the minimum for each. BASEBOOK also caps a single real trade while it is early.

If you would rather not fund anything yet, the ticket opens in practice mode by default, with a virtual balance on real live prices and no wallet connection at all.

What you are trading

A perpetual that tracks an asset's price. You are not buying the share, and no one is holding it on your behalf, so there are no shareholder rights and no dividends. Positions are collateralised and settled in USDC on Base, and every fill is a Base transaction you can verify on Basescan.

One market is not a listed company: SPCX tracks a synthetic valuation index for SpaceX, which is private and has no share to track. It trades and settles exactly like the rest.

Limits enforced onchain

Gains sets a maximum leverage and a minimum position size per pair. Min collateral below is the smallest amount that can open at that pair's maximum leverage. Under it, the order is rejected. BASEBOOK additionally caps a single real trade at $200.

29 tradable markets · generated 2026-08-18 from the Gains diamond 0x6cD5aC19a07518A8092eEFfDA4f1174C72704eeb on Base. 16 listed companies have no live Gains market and are price-only: V, MA, PFE, KO, DIS, NKE, ABNB, BA, SBUX, WMT, SBET, BIDU, ROKU, XOM, LLY, ANTH.

Fees

Gains charges a position-size fee per side (0.035% on crypto, 0.03%–0.05% on stocks) plus the pair spread (0.01%–0.06%). Holding a position also accrues a per-block borrowing fee sized by the pair's open interest imbalance. BASEBOOK adds no fee of its own and currently takes no share of the Gains fee either: the referrer address is not registered, which is verifiable by calling getReferrerDetails on the diamond. The exact cost of your order is shown in the ticket before you sign.

Liquidation

A position is liquidated once losses reach 90% of its collateral; that threshold tapers toward 75% above 25× leverage. Liquidation costs up to 10% of remaining collateral. Your liquidation price is shown before you submit.

Prices

Two different prices are involved. The prices displayed across this site are vendor quotes (Coinbase for crypto, Yahoo Finance for stocks), and are indicative only. Your fill is priced by the Gains oracle network at execution, which is why the number you sign for can differ from the number on screen.

Sessions and downtime

Crypto pairs trade continuously. Stock pairs only open while the US equity session is open. Market orders expire if they are not executed within 30 blocks, and a Base outage or RPC failure can delay opening or closing a position.

The BASEBOOK token

$BASEBOOK (contract symbol BB) was deployed on Base on 18 August 2026 and trades against WETH on Uniswap. Total supply is 100,000,000,000 with no mint function, so it cannot grow. The deployer holds none of it: supply is either held by the market or sitting in the pool as liquidity.

Always check the contract address against this page and the site banner before trading. Anyone can deploy a token using the same name.

Risk

Leveraged trading can lose your entire collateral, quickly. Only risk what you can afford to lose. Nothing on this site is investment advice. See the terms and risk disclosure.