the vault that guards itself · on Robinhood Chain
The vault that guards itself.
Arca is a fully-backed stock index on Robinhood Chain. One token holds a whole basket of tokenized stocks. An autonomous agent rebalances it — and can never withdraw a cent. Don't trust; look inside.
Backed by real stock tokens on Robinhood Chain
The box was never the problem. The guard was.
arca — Latin for the strongbox, the chest where Rome kept what mattered. For as long as people have had something worth keeping, they built a box to keep it in — and then hired someone to guard the box.
Every vault in history shared one quiet flaw: a human hand held the key. You never really trusted the vault. You trusted the person standing in front of it, and hoped they'd still be honest tomorrow. Crypto was supposed to end this. Instead it rebuilt it, faster — a founder with the multisig, a team wallet with the supply, a manager who swears the funds are safe right up until the morning they aren't.
The lock has no key. The custodian is the contract.
Arca is the vault that guards itself. A basket of real, tokenized stocks, sealed by code instead of a keeper. An agent can rearrange what's inside — swapping one holding for another as the market moves — but no hand, not the agent's and not ours, can reach in and take anything out.
We started as Fides — Latin for faith. An honest name for a dishonest era, where everyone asks you to have faith in the team. But our whole thesis was the opposite of faith. So we kept the discipline and dropped the word. Fides was the promise; Arca is the proof.
The door is glass.
One token. A whole index, sealed.
Deposit the basket
Put in the underlying tokenized stocks and receive one token — your share of the whole index, backed 1:1.
The agent rebalances
An autonomous agent rotates the weights on schedule, swapping only within a fixed whitelist. It cannot withdraw, pause, or change the rules.
Redeem, anytime
Burn the token and get the basket back, in-kind, matched to exactly what the vault holds. No queue, no permission, no keeper to ask.
One box open. More to seal.
Each index is one token, backed 1:1 by the stocks it holds and rotated by the agent on schedule. Frontier is open now; Blue seals next.
No key. No keeper. No exit.
The agent sets the weights. It never holds the keys. This isn't a pledge — it's what the code permits, and what it plainly forbids.
Agent's only powers: rebalance within a fixed whitelist, capped slippage and turnover. It cannot withdraw, cannot pause your redemption, cannot change the rules after deploy.
The ledger
Every move, on-chain and in order — read live from the vault's own Mint, Redeem, and Rebalanced events. Click any row to verify. Full activity & holders →