Stack your stocks into one token.
Pick a few stocks and how much of each. Cairn makes them one ERC-20 — a basket you buy with dollars in a single transaction, hold, send, and sell the same way. Every share is backed by the stocks themselves.
Stack a cairn
Live pricesStocks (up to 8, split evenly)
Buy
One share of a new cairn is worth $10 at Robinhood's prices on the day it is made.
Ready-made
Cairns to start from
Each has fixed contents and a permanent address. The first person to buy one makes it; after that everyone shares it.
How it works
One share, many stones
A cairn's contents are fixed forever when it is made: one share is always backed by the same amount of each stock.
Build it
Choose up to eight stocks and their weights, a name and a ticker. The factory makes the token at an address fixed by its contents — nobody owns it, not even you.
Buy with dollars
Say how many shares. The cairn buys exactly what they need of every stock through Uniswap, mints the shares to you and refunds every dollar it did not spend — one transaction.
Hold, send, sell
It is an ordinary ERC-20: it sits in your wallet, moves in one transfer, and sells back to dollars in one transaction. Or redeem it for the stocks themselves.
What keeps it honest
Backed share for share, always
The rules are in the contract, the same for everyone, and cannot be changed by anyone.
Backing
The stocks are in the token
Minting takes each stock rounded up; redeeming returns it rounded down. So a cairn always holds at least what every share is owed — and you can check it on the explorer at any block.
Your limit
Never more than you said
A buy carries your maximum and a sale your minimum, both quoted live by Uniswap. If prices move past them, the whole transaction is undone and nothing moves.
Exits
Two ways out, always open
Sell for dollars through the same pools, or redeem for the stocks themselves and keep them. Neither needs anyone's permission.
The contract
No owner, no fee, no upgrade
One small factory and the baskets it makes. Nobody can pause them, change their contents or take a cut. They have not been audited: read the source on the docs page.
What you can stack
26 stocks, each with a feed
Every Robinhood stock token with a Uniswap pool and a Robinhood price feed. Costs are what a real $25 buy returned through the pool at block 73,074,128, against that feed.
| Stock | Price | $25 buy costs |
|---|---|---|
NVDA NVIDIA NVDA | $225.66 | under |
SGOV Treasury bills ETF SGOV | $101.17 | under |
SLV Silver ETF SLV | $58.27 | under |
AAPL Apple AAPL | $341.45 | under |
SPY S&P 500 ETF SPY | $772.33 | under |
META Meta META | $748.65 | under |
QQQ Nasdaq-100 ETF QQQ | $745.36 | under |
GLD Gold ETF GLD | $392.87 | under |
GOOGL Alphabet GOOGL | $343.70 | under |
USAR USA Rare Earth USAR | $15.20 | under |
SPCX SpaceX SPCX | $148.64 | under |
TSLA Tesla TSLA | $371.75 | 0.03% |
AMZN Amazon AMZN | $249.94 | 0.05% |
GME GameStop GME | $23.46 | 0.09% |
MU Micron MU | $1082.82 | 0.14% |
AMD AMD AMD | $630.03 | 0.14% |
PLTR Palantir PLTR | $190.31 | 0.22% |
MSFT Microsoft MSFT | $516.82 | 0.24% |
INTC Intel INTC | $123.42 | 0.25% |
ASML ASML ASML | $1744.49 | 0.28% |
TSM TSMC TSM | $452.04 | 0.36% |
MSTR Strategy MSTR | $158.70 | 0.44% |
SNDK SanDisk SNDK | $1778.54 | 0.92% |
DELL Dell DELL | $563.38 | 1.15% |
CRCL Circle CRCL | $87.36 | 1.33% |
USO Oil ETF USO | $148.70 | 1.85% |
What exactly is a cairn share?
An ERC-20 token. One whole share is backed by a fixed amount of each stock in the basket, held by the cairn's own contract. The amounts were set when the cairn was made — $10 worth at Robinhood's prices that day — and never change.
Does it rebalance?
No. The number of each stock per share is fixed, so the weights drift with prices exactly as if you held the stocks yourself. That is what makes it redeemable one-for-one and impossible to tamper with.
Are these real shares?
They are Robinhood's tokenized stocks on Robinhood Chain, bought from Uniswap's pools. They are not shares held at a brokerage in your name.
What does it cost?
Uniswap's pool fee on each stock (0.05% to 1%, in the table above) and a fraction of a cent of gas. Cairn takes nothing.
Can I build my own?
Yes — up to eight stocks, any weights, your own name and ticker. Anyone else can then buy it too, at its own address.
What if a pool is thin?
The quote shows every leg before you buy. A basket costs what its most expensive leg costs; the page shows the live total against Robinhood's prices so you can see it before signing.
Stack your first cairn
Pick the stocks you believe in and hold them as one token. It takes about a minute.