For the press
Free to quote, with credit
We measure what it costs to trade tokenized US stocks on public blockchains, and how much selling the pools we read can take, from our own readings of Solana, Robinhood Chain, Base and BNB Chain every 15 minutes. Quote any number on this site, free, with the credit beside it.
How to cite
Fillable 10
Fillable 10, Sun 1 Nov 2026: 5.8 bp (fillable.ai/cost-index).
Any other figure
Source: Fillable (fillable.ai), from its own readings of public blockchains.
A monthly statement
Fillable on-chain statement, October 2026 (fillable.ai/statement/2026-10).
A chart
Chart: Fillable (fillable.ai)
The words we use
Round tripBuy a stock token, then sell the same tokens straight back. What that loses, fees and price impact (how far the trade itself moves the price) included, is the cost of trading it. 1 bp is 0.01%: 12.5 bp is $12.50 on $10,000.
Fillable 10Our daily cost index: the median $10,000 round trip across ten US stocks and funds, each at its cheapest pool on four chains. Its rules are published.
Depth to 2%How many dollars of a token could be sold into the pools we read before its price falls 2%: how much could be sold at once without a big drop.
PoolWhere a token trades on a blockchain: liquidity held by a contract that prices every trade from its own state, which anyone can read.
What is free
- Every number and chart on fillable.ai, quoted or shown with the credit.
- Each month’s statement, chain by chain and issuer by issuer: the October 2026 statement.
- Data for a story: ask, and we answer in writing, free, usually within a day.
- Every day of Fillable 10 as a file: cost-index.csv.
Rules we keep
No one pays for a placeNo exchange can pay for a better place in our numbers.
Nothing rewrittenA number we have published is never replaced. A fix is a dated note on fillable.ai/corrections.
Measurement, not adviceWe never say what to buy, sell or hold.
CheckableEvery measured number is worked out from public chain state, and each night our raw readings are timestamped in Bitcoin: fillable.ai/proof.