Cumulative Spread Margin
("Contrarian Bridgejumping")
Week One
If you are unfamiliar with the "Contrarian Bridgejumping" handicapping method, we suggest you read the following first:
As the name suggests, "Cumulative Spread Margin" involves totaling up how a team has performed in terms of net points against the lines on their games. For instance a team that won by eight while favored by three would accrue +5 points of CSM for the effort. On the other hand a team that lost by eight while favored by three would get a -11 CSM for that game.
Similar to the Turnover Difference Theory (another contrarian indicator), the CSM angle suggests playing the team with the BAD Cumulative Spread Margin in match-ups with a significant difference, which is defined as 6+ CSM points per game.
Example: if team A is averaging a -2 pt CSM and team B is +5 CSM per game so far, then team A would be the play based on being 7 CSM pts worse per game.
While the method is focused on the week 5 to week 12 heart of the season, it seems logical that the angle might work fairly well for the first week of a season, given that the lousy teams from last year will probably be under-rated, while the good teams from last season may generally be over-rated. Here are the CSM results in week one games:
Week 1 "Cumulative Spread Margin" results 1984-2005 (using prior season's stats)
| Overlay |
6 - 7.9 |
8+ Pts |
| HomeFavs |
7 - 4 |
1 - 0 |
| HomeDogs |
7 - 3 |
9 - 3 |
| AwayFavs |
0 - 1 |
0 - 0 |
| AwayDogs |
8 - 6 |
8 - 6 |
| Favorites |
7 - 5 |
1 - 0 |
| Underdogs |
15 - 9 |
17 - 9 |
| Home Teams |
14 - 7 |
10 - 3 |
| Away Teams |
8 - 7 |
8 - 6 |
| ALL PICKS |
22 - 14 |
18 - 9 |
| WIN % |
61 % |
67 % |
Spread Ranges for the 6+ Difference plays
| Spread Range |
10+ points |
5 to 9.5 |
0 to 4.5 |
| Favorites |
0 - 0 |
1 - 0 |
7 - 5 |
| Underdogs |
4 - 3 |
12 - 10 |
15 - 6 |
So it's a little impressive seeing the 6+ plays (the only ones that count) have compiled a 40-23 record from 1984-2005.
Let's take a look then at the 2006 season matchups:
Away CSM |
Away Team |
Line (Home) |
Home Team |
Home CSM |
Pick |
CSM Diff |
| 2.2 |
Miami |
-1.5 |
Pittsburgh |
4.0 |
|
-1.8 |
| -1.4 |
Atlanta |
-6 |
Carolina |
3.9 |
|
-5.3 |
| -1.0 |
Baltimore |
-3 |
Tampa Bay |
-.3 |
|
-.7 |
| -3.4 |
Buffalo |
-9 |
New England |
-.5 |
|
-2.9 |
| .8 |
Cincinnati |
-2 |
Kansas City |
4.0 |
|
-3.2 |
| 4.5 |
Denver |
+3.5 |
St. Louis |
-3.8 |
St. Louis |
8.3 |
| -6.0 |
New Orleans |
-3 |
Cleveland |
-.5 |
|
-5.5 |
| -2.6 |
N.Y. Jets |
-2.5 |
Tennessee |
-3.9 |
|
1.3 |
| -4.9 |
Philadelphia |
+4.5 |
Houston |
-4.3 |
|
-.6 |
| 7.0 |
Seattle |
+6.5 |
Detroit |
-3.3 |
Detroit |
10.3 |
| 3.4 |
Chicago |
+3.5 |
Green Bay |
-.7 |
|
4.1 |
| -.1 |
Dallas |
-2.5 |
Jacksonville |
2.8 |
|
-2.9 |
| -2.1 |
San Francisco |
-8 |
Arizona |
-2.2 |
|
.1 |
| 3.3 |
Indianapolis |
+3.5 |
N.Y. Giants |
4.0 |
|
-.7 |
| -1.5 |
Minnesota |
-4.5 |
Washington |
2.5 |
|
-4.0 |
| 3.3 |
San Diego |
+3 |
Oakland |
-3.1 |
Oakland |
6.4 |
ANALYSIS:
Three underdogs are selected by the CSM method for the openers, based on the prior season performance against the spread:
St. Louis +3.5, Detroit +6.5, and Oakland +3.
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