Smart money holds the underdog side

Most tracked traders hold Under, while the market favors Over (63%). 2 of 4 traders hold an outcome priced under 50%.

Historically, consensus on sides priced under 40¢ lost money after costs.

Levante UD vs. Club Atlético de Madrid: O/U 2.5

2 of 4 top Polymarket traders hold Under (50%) · Under at 37¢ · $54 held · ends Oct 31

Over63¢Under37¢Ends Sat, Oct 31, 2026View on Polymarket

SIGNAL

⚖️

Neutral

Under

Consensus Traders

Under 50%

Total Value

$54.44

Combined PnL

-$0.1

Research grade

NeutralUnder at 37%

No measured edge, which here means a loss: the plain consensus (5+ holders, 60 %+, held to resolution) lost −3.0 % a trade after costs out of sample in the full-year test (n 86,296, 95 % CI −3.6 to −2.4 %).

Spread or totalOct 22 backtest: spreads and totals −14.5 % a trade in spring (95 % CI −27 to −1), +1.5 % in October: no edge.
Consensus under 60 %Every backtest started at 60 %+ of the holders; below that nothing was measured.
Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.
Side priced 30–50¢Full year, out of sample: 0.30–0.50 lost −4.8 % a trade (n 16,830, 95 % CI −6.6 to −3.1), worse than the plain consensus.

The rules come from our Oct 22 2026 backtest (one entry per market, held to resolution, after a 1¢ half-spread and Polymarket's taker fees). Our full-year test without hindsight (Oct 26 2026) found none of them profitable out of sample, and the plain consensus lost −3.0 % a trade. The grade describes the market; it is not a forecast, not an edge and not advice.

Smart Money Signal

Under

2 of 4 top traders (50%)Underdog side (market favors Over 63%)2 hold an outcome priced under 50%4 small positions dimmed (<$100 invested)

Market Activity

Outcome Probabilities

Over63%

Under37%

Smart Money Breakdown by Outcome

Under2 traders

Total Value$40.7

Total Shares110

Combined PnL-$0.03

Over2 traders

Total Value$13.74

Total Shares22

Combined PnL-$0.07

Under — 50%Over — 50%

Trader	Position	Invested	Value	PnL	Record
38 38791873984189CTR<$100	Underavg 37¢	$38.85	$38.85	+$0	46% 8071-9516 (17587)
TH thatsabing0<$100	Overavg 64¢	$9.56	$9.49	-$0.07	93% 2989-242 (3231)
GO GoalLineGhost<$100	Overavg 63¢	$4.25	$4.25	+$0	50% 24902-24623 (49525)
AM ameisgoat11CTR<$100	Underavg 37¢	$1.85	$1.85	-$0.03	47% 2290-2563 (4853)

38791873984189CTR<$100

Under

Invested

$38.85

Value

$38.85

PnL

+$0

Record

46%

8071-9516 (17587)

thatsabing0<$100

Over

Invested

$9.56

Value

$9.49

PnL

-$0.07

Record

93%

2989-242 (3231)

GoalLineGhost<$100

Over

Invested

$4.25

Value

$4.25

PnL

+$0

Record

50%

24902-24623 (49525)

ameisgoat11CTR<$100

Under

Invested

$1.85

Value

$1.85

PnL

-$0.03

Record

47%

2290-2563 (4853)

Research grade

NeutralUnder at 37%

Spread or totalOct 22 backtest: spreads and totals −14.5 % a trade in spring (95 % CI −27 to −1), +1.5 % in October: no edge.
Consensus under 60 %Every backtest started at 60 %+ of the holders; below that nothing was measured.
Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.
Side priced 30–50¢Full year, out of sample: 0.30–0.50 lost −4.8 % a trade (n 16,830, 95 % CI −6.6 to −3.1), worse than the plain consensus.

Smart Money Signal

Under

2 of 4 top traders (50%)Underdog side (market favors Over 63%)2 hold an outcome priced under 50%4 small positions dimmed (<$100 invested)

Chat

EV Calculator

Your estimated chance that Under wins (%)

Consensus % is how many tracked traders hold a side, not a win probability.

Stake (USDC)

Break-even chance39.2%

37.0¢ price + 1.0¢ spread + 1.2¢ fee (Sports 5%). Win more often than this and the bet pays.

Expected Value—

Expected ROIenter your estimate

Max Profit

+$155.25

Max Loss

-$100.00

255.2

A market order pays the taker fee and crosses the spread (assumed 1.0¢); a limit order pays no fee but may not fill. The fee category is a guess from the title.