Measured spreads
The gap between the best buy and sell offer on each exchange's order book — the cost that no fee table shows.
No data yet. The order-book measurement is not connected; this page fills itself as soon as it is. Nothing is shown in its place.
FAQ
How is the spread measured?
From each exchange's public order book: best ask minus best bid, divided by the mid price. Snapshots are taken every five minutes; the ranking uses the median so that a single thin moment does not decide it.
Why are brokers and banking apps missing?
They have no public order book. Their margin is inside the quoted price and cannot be measured from outside, so they are not ranked here.