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Salisbury draw bias

Yes, in places. Across 245 races from 2023-06-01 to 2026-06-09: over 5-6f — moderate: high (outside) favoured (iv 1.14); over 7-8f — moderate: middle favoured (iv 1.16); over 9-12f — strong: high (outside) favoured (iv 1.39). Check the A/E column before betting it: a bias the market already prices in is not an edge.

2023-06-012026-06-09 results · 245 races · updated 9 June 2026

5-6f · 93 races

Moderate: high (outside) favoured (IV 1.14)
5-6f · 93 races · field avg win 10.4%
Moderate: high (outside) favoured (IV 1.14)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
10.2%
33 wins
17.5%
0.97
vs course avg
0.82
vs market
63.9%325
Middle
9.2%
25 wins
16.2%
0.88
vs course avg
0.89
vs market
58.1%271
High (outside)
11.9%
35 wins
18%
1.14
vs course avg
1.29
vs market
62.2%295

7-8f · 90 races

Moderate: middle favoured (IV 1.16)
7-8f · 90 races · field avg win 10.7%
Moderate: middle favoured (IV 1.16)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
9.5%
29 wins
18.8%
0.89
vs course avg
0.93
vs market
64.5%304
Middle
12.4%
31 wins
18.7%
1.16
vs course avg
1.10
vs market
66%251
High (outside)
10.4%
29 wins
16.2%
0.98
vs course avg
1.00
vs market
61.1%278

9-12f · 62 races

Strong: high (outside) favoured (IV 1.39)
9-12f · 62 races · field avg win 11.8%
Strong: high (outside) favoured (IV 1.39)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
8.8%
17 wins
14.5%
0.74
vs course avg
0.87
vs market
58.8%193
Middle
10.3%
16 wins
19.4%
0.87
vs course avg
0.65
vs market
66.7%155
High (outside)
16.5%
29 wins
26.1%
1.39
vs course avg
1.52
vs market
67.1%176

Common questions

Is there a draw bias at Salisbury?

Yes, in places. Across 245 races from 2023-06-01 to 2026-06-09: over 5-6f — moderate: high (outside) favoured (iv 1.14); over 7-8f — moderate: middle favoured (iv 1.16); over 9-12f — strong: high (outside) favoured (iv 1.39). Check the A/E column before betting it: a bias the market already prices in is not an edge.

Does the market already price in the Salisbury draw bias?

Not fully. The favoured thirds at Salisbury hold A/E at or above 1 in our window — the bias has not been completely priced away, which is where a draw edge can actually pay.

What do IV, A/E and PRB mean?

IV (Impact Value) is the group's win rate versus all runners in the same races — 1.00 is neutral. A/E is actual wins versus what de-overrounded Betfair prices expected — below 1 means the market over-bets that group. PRB is the mean percentage of rivals beaten, a finer-grained placing measure.

Method: stall numbers grouped into field thirds (low/middle/high) per race, so field size never skews the groups; IV against same-course same-band baseline; A/E against de-overrounded Betfair SP. Small samples are flagged rather than hidden. Racing Alpha does not accept bets. 18+ · BeGambleAware.org.