Smart money holds the underdog side

Most tracked traders hold Under, while the market favors Over (60%). 2 of 4 traders hold an outcome priced under 50%.

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

Chelsea FC vs. Manchester United FC: O/U 8.5 Total Corners

2 of 4 top Polymarket traders hold Under (50%) · Under at 40¢ · $148 held · ended Oct 31

Over60¢Under40¢Ended Sat, Oct 31, 2026View on Polymarket

SIGNAL

⚖️

Neutral

Under

Consensus Traders

Under 50%

Total Value

$148.33

Combined PnL

$4.61

Research grade

NeutralUnder at 40%

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 60%)2 hold an outcome priced under 50%4 small positions dimmed (<$100 invested)

Market Activity

Outcome Probabilities

Over60%

Under40%

Smart Money Breakdown by Outcome

Under2 traders

Total Value$75.66

Total Shares190

Combined PnL+$5.53

Over2 traders

Total Value$72.66

Total Shares121

Combined PnL-$0.92

Under — 50%Over — 50%

Trader	Position	Invested	Value	PnL	Record
FO fortunekingCTR<$100	Underavg 37.2¢	$67.44	$72.19	+$4.74	59% 779-543 (1322)
88M<$100	Overavg 59.9¢	$61.23	$61.56	+$0.33	42% 783-1079 (1862)
poshposh<$100	Overavg 67¢	$12.35	$11.1	-$1.25	59% 10176-7169 (17345)
0X 0x3822028fC1c17B00DD2f84846F91c14B996CBFe6-1778488989186CTR<$100	Underavg 31¢	$2.7	$3.48	+$0.78	52% 139-127 (266)

fortunekingCTR<$100

Under

Invested

$67.44

Value

$72.19

PnL

+$4.74

Record

59%

779-543 (1322)

88M<$100

Over

Invested

$61.23

Value

$61.56

PnL

+$0.33

Record

42%

783-1079 (1862)

poshposh<$100

Over

Invested

$12.35

Value

$11.1

PnL

-$1.25

Record

59%

10176-7169 (17345)

0x3822028fC1c17B00DD2f84846F91c14B996CBFe6-1778488989186CTR<$100

Under

Invested

$2.7

Value

$3.48

PnL

+$0.78

Record

52%

139-127 (266)

Research grade

NeutralUnder at 40%

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 60%)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 chance42.0%

39.8¢ 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

+$138.12

Max Loss

-$100.00

238.1

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.