A return figure needs the price a prediction was available at when we published it. We now freeze that price against each prediction at the moment it goes out, together with the bookmaker and the time the price was quoted. A profit figure will appear here once enough of those have been settled to mean anything.

Nothing published before that change can ever be included, and it is worth being exact about why: we only keep bookmaker odds for three days, and each refresh overwrites the previous price rather than adding to it. The prices our older predictions were available at are not stale in our records — they are gone. Reconstructing them from today’s odds would produce precisely the flattered number this section exists to refuse.

Not every prediction will carry one. Our feed prices a match-winner market on roughly two thirds of fixtures — 127 of 200 on the day this was measured — and a prediction with no published price is left out of the calculation rather than counted as a bet that returned nothing.