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MSR DecodeLeaderboard AutopsySample case study

The top of the leaderboard is mostly bots you can't copy.

We decoded the wallets Polymarket ranks as "smart money." Their profits are real. Their strategies are uncopyable — and by displayed PnL alone, you can't tell them apart from a lucky coin flip.

Venue  Polymarket Method  full on-chain fill reconstruction Pulled  2026-07-11 Verdict vocabulary  real edge artifact farming
01

Why "who's winning?" is the wrong question

Every leaderboard and copy-trading tool ranks wallets by profit. But profit doesn't tell a copier the one thing that decides whether they'll make money: is this edge reproducible, or is it a bot doing something you structurally cannot?

65% Of one top wallet's $48M of buy volume was placed at prices ≥ $0.99 — i.e. buying outcomes that were already ~decided. That's not prediction. It's arbitrage a follower can't execute. Below, the receipts.
02

Flagship decode — "debased"

0x24c8cf69a0e0a17eee21f69d29752bfa32e823e1  ·  ~$503M volume  ·  ~$1.67M displayed profit  ·  444 markets  ·  74,345 fills

Verdict: artifact — uncopyable

A leaderboard sees a high-volume, seven-figure-profit "smart money" wallet. The full fill history says bilateral market-maker + near-certain-outcome harvester, not a directional trader:

  • 65% of buy volume at ≥ $0.99 — buying outcomes already priced as near-certain, to capture the last fraction of a cent to $1.00.
  • 67% of its markets traded on both sides (YES and NO) — the signature of merge/spread arb, not a directional call.
  • Average buy price $0.78 across geopolitical markets (Russia–Ukraine ceasefire, US–Iran, Trump nominations) — expensive, near-resolved entries.
On-chain receipts — buys placed at near-certainty

market: "Will Portugal win the 2026 FIFA World Cup?"
  BUY 126,195 NO shares @ avg 0.9981 for $125,950  · 2026-07-06 20:58
  BUY   8,609 NO @ 0.9980 = $8,592   · 20:58
  BUY   2,804 NO @ 0.9900 = $2,776   · 20:54
  → 151,227 NO shares @ avg 0.9975 for $150,856, all inside a 4-minute window (three largest fills shown; 21 fills at ≥0.99 in this window, all in the artifact)

market: "Will USA win the 2026 FIFA World Cup?"
  BUY 2,863.7 NO shares @ avg 0.9950 for $2,849.38  · 8 fills, 2026-07-07 01:21:25–01:21:28

It isn't predicting Portugal or the USA lose. It's buying an all-but-settled outcome for a locked ~0.25¢ spread, at size. A copier mirroring this pays $0.9975 for $1.00 — no edge, all tail risk.

Correction, added 2026-07-16 — the arithmetic on this receipt. Every dollar amount here is shares × price, rounded half-up to the dollar; each line is now checked against that rule by tools/audit.mjs and the build fails if one drifts. Two were wrong when this page went up. The largest fill printed $125,950 where 126,195 × 0.9980 is $125,942.61 — $7.39 high, and reachable by no rounding model, while its two sibling lines rounded correctly to the dollar. The USA line printed $2,849 where 2,864 × 0.9950 is $2,849.68, which truncates to 2,849 but rounds to 2,850 — so the block was using two different rules at once. The subtotal line is not an error and is left alone: 151,227 × 0.9975 appears to miss by $7.07, but 0.9975 is a 4-decimal display of 150,856/151,227 = 0.99754673, and a 4dp average carries enough slack ($7.56 across this size) to cover it — the product is the wrong relationship to check, the quotient is the right one. (Superseded in part 2026-07-18, next paragraph: the "$125,943" and "$2,850" this pass produced were themselves not sourced to anything — see below.)

Correction, added 2026-07-18 — sourced against a committed artifact, and two totals move again. The 2026-07-16 pass checked that each line was internally consistent; it had no transaction data to check the lines against, because none had been kept. A 2026-07-18 per-market re-fetch (both markets, paged to a clean under-cap finish; every fill behind all five lines, hashed, is now committed at debased-receipts.json) supplies that missing check, using usdcSize — the exact on-chain USDC amount per fill, the field this site's other reconstructions treat as authoritative — as the dollar figure for each line. Two lines' sourced totals are not what shares × displayed price gives. The largest Portugal fill is one on-chain transaction whose usdcSize is $125,949.86, which rounds to $125,950 — $7 above the $125,943 this page printed after the 2026-07-16 pass, and exactly the figure this page printed before it. The USA line is eight separate transactions in a 3-second window totaling $2,849.38 — $0.62 below the $2,850 the 2026-07-16 pass printed, and (at the dollar) exactly the pre-2026-07-16 figure. The two lines fail the product check for different reasons, both evidenced in the artifact: the Portugal fill's own usdcSize does not equal its displayed price times its displayed share count (a 3-decimal display price is not the exact multiplicand), while the USA line's eight legs all price at exactly 0.995 and its 2026-07-16 figure came from multiplying a share count that had been rounded up (2,864 × 0.995 = $2,849.68 → $2,850; the true count is 2,863.7). Both lines now print in the same avg/quotient format the subtotal line already used — the USA line at full precision, so its printed pair reproduces the artifact's sums exactly. The fresh, hashed artifact says the two originals — typed 2026-07-11, before anyone checked either relationship — were the numbers that tied to the ledger, and the arithmetic-only pass moved them away from it while making them look more rigorous. The 8,609- and 2,804-share lines are untouched: their usdcSize matches shares × price exactly, so the product format still ties them without adjustment.

What this receipt is sourced to, and what it still isn't. The wallet's full address is 0x24c8cf69a0e0a17eee21f69d29752bfa32e823e1 — independently look-up-able, matched against three files in the decode engine that agree on it. The fills behind all five lines above are the committed, hashed artifact linked in the correction directly above, not a hand-typed 2026-07-11 pull with nothing kept. Unchanged: debased's exact net PnL is still not decision-grade — at 444 markets / 74K fills / heavy merges, reconstruction needs deeper accounting than a five-line receipt attempts — and the strategy classification still rests on the prices and sizes shown, not on these dollar totals. The card’s summary stats above the receipt (74,345 fills · 444 markets · 65% / 67% / $0.78) are not sourced to that artifact: the fills count disagrees with the engine’s own saved output by 757 (ours high, ~1%) — logged as U4 in the same table, magnitude and direction only. Logged as RECONCILED in the unreconciled-items table, U3.

03

Full-history decode — the rest of the leaderboard

We pulled the fill history for each of the next five — 14,000 to 469,000 fills apiece — and ran the same classification debased got. The story holds: the biggest names are market-makers, arbitrageurs, and lottery players whose edge is structure or variance, not calls a retail account could follow.

Correction, added 2026-07-16 — this sentence used to say “complete fill history,” and one row proves it was not. Re-fetching swisstony on 2026-07-16 returns 2,918,281 fills — its whole life, 2025-08-09 to 2026-07-16, every window verified complete — against the 14K printed below as its lifetime total: off by more than 200×. (This correction first published “at least 1,819,142… more than 130×” while the lifetime fetch was still running and had only reached 2026-04-26. That floor was true; it understated our own error by 80×, and a floor is not something to leave standing once you have the measurement.) The cause is ours, not the wallet’s: Polymarket’s feed caps at ~3,400 rows per wallet and 3,500 per time-window, so a history this size is only reachable by recursively subdividing the window, and our 2026-07-11 pull did not. We are not restating the other four counts, because we have not re-measured them — and we are not deleting the word without saying why it went. The whole table is now suspect and is logged as such (UNRECONCILED.md, U1–U2). What survives is the classification, and only because of what it rests on: the shape of the fills we did see — two-sided share, price distribution — not their count. A sample still shows a market-maker. But we are not going to dress that sample up: the pull behind this table is roughly 0.5% of the lifetime book above it. (This sentence first read “a 2.9% sample of a market-maker’s book”. The 2.9% is not this page’s: it belongs to the Scorecard’s separate 30-day fetch, and borrowing it overstated this table’s own coverage by about six times — in our favour, on the page apologising for a count.) What does not survive is any count on this page.
Top wallets, classified by strategy signature, as of the 2026-07-11 pull. The monthly Scorecard is a different measurement — a 30-day window, recomputed 2026-07-15 — so displayed profits differ legitimately between the two. The fill counts do not differ legitimately. This caption used to explain that a 30-day count can exceed a lifetime count “if it kept trading between the pulls”; on 2026-07-16 we tested that and it is false. swisstony ran ~47,000 fills in those four days, and its real lifetime total is 2,918,281 — the story was covering an unmeasured gap, which is exactly what our own doctrine forbids: a gap gets reconciled or logged, never narrated. It is logged (UNRECONCILED.md U1). Where the numbers matter, the Scorecard and the workpaper are the cycle’s record; the counts on this page are not.
WalletDisplayed · Polymarket
full history, pulled 2026-07-11
Full history
as of the 2026-07-11 pull
Signature (full fills)What it really isRetail-copy verdict
swisstony$18.6M514 mkts · 14K fills
withdrawn 2026-07-16 — a re-fetch counts 2,918,281 fills, >200× this. See the correction above.
35% bilateral · 11% ≥$0.99Mixed market-maker / arb flownot copyable
RN1$11.1M10,062 mkts · 324K fills56% bilateralPure bilateral market-maker — spread capturenot copyable
ImJustKen$3.3M2,140 mkts · 135K fills59% bilateral · 14% ≥$0.99Bilateral MM + redemption-arb tailnot copyable
debased$1.67M444 mkts · 74K fills67% bilateral · 65% ≥$0.99Near-certain-outcome harvester (full decode, §02)not copyable
tripping$89.5K656 mkts · 469K fills80% of buys sub-cent ≤$0.02Sub-cent longshot lottery — pure variancevariance
suntori−$4.6M1,484 mkts · 53K fills26% bilateral · high volumeHigh-volume net loseravoid

Why no reconstructed-PnL column here: at hundreds to 10,000+ markets, exact cashflow reconstruction off the public feed is not decision-grade — merges, redemptions, and per-market API limits dominate the cashflow view. That limitation doesn't touch the copy verdict: every signature above is computed from the fill history we pulled and is enough to classify whether a retail user could realistically copy the wallet. Displayed profit is Polymarket's own leaderboard figure, pulled 2026-07-11 — this line said 2026-07-12 until 2026-07-16, contradicting the five other places on this page that date the same pull, including the column header directly above it.

04

The contrast — what real, copyable edge looks like

Not everyone is a bot. When we reconstruct a genuinely directional wallet, our engine ties out to Polymarket's own number — proving the method, and letting the difference between "real" and "artifact" show cleanly.

  • Theo4 — real edge — the 2024 election whale. $13.8M+ into Trump/Harris presidency & popular-vote markets, held to resolution. Directional conviction. Copyable in principle (if you have the conviction and the bankroll).
  • myzbsq — one lucky bet — reconstructed to 99.6% of its displayed $1.22M. But that $1.22M is a single bet: bought "No Argentina" on one World Cup match at ~$0.15, rode it to $0.99, sold. Not a strategy — a coin flip that landed. Copying "myzbsq +$1.2M" copies the outcome, not an edge.
On the profit leaderboard, debased, RN1, Theo4 and myzbsq sit in the same list, ranked by the same dollar sign. One is uncopyable arb, one is a market-maker, one is real conviction, one is a lottery ticket. A copier — and every tool that ranks them — cannot tell which is which. That distinction is the product.
05

For an operator reading this

Your leaderboard ranks these wallets identically. Your users copy the number and lose. The closest anyone has measured this is in crypto, not prediction markets: across 1,486 copy-trading leaders on Binance, Bybit and MEXC, 97.04% were green on their own PnL and only 43.61% produced positive PnL for their followers.1 Different venue, different instrument — but it is the same gap this page is about, and we have not found a published prediction-market version.

MSR Decode produces a Replicability Score: a per-wallet verdict — real / artifact / farming — with the on-chain evidence behind it. We are evaluating machine-readable access that could sit as a column next to your PnL ranking, so your leaderboard stops misleading and your copiers stop torching money; among the tools we inspected, none ships that combination today. No self-serve product, commercial data license, or redistribution right is offered on this page — see the pilots page.

Want the full decode of your current #1 wallet, free? We'll send the receipts. If it's useful, talk to us about a scoped pilot — machine-readable delivery is under evaluation.

1. Yieldfund, “Is Copy Trading Profitable? A 90-Day Multi-Exchange Study” (Vlad Hatze, published 24 Nov 2025): 100,236 copier outcomes across 1,486 lead traders on Binance, Bybit and MEXC, over a 90-day window to 24 Oct 2025. Both percentages are over all leaders in that sample, which is the study's own denominator — an earlier version of this page said “~56% of even profitable leaders,” a figure the study does not support: it is 100 − 43.61 re-labelled onto a smaller population, and the honest range for that population is 55.1–58.1%, not a point estimate. Corrected 2026-07-16. This is self-reported vendor research and the leader-level data is not published, so we cannot recompute it; we cite it as the closest measurement that exists, over a population that is not ours.

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