Jay Edgar NBA, Report on 2006-07 Block I (Oct 31-Nov 15)
Quick explanation:
I keep weighted power ratings which are updated daily and put into a formula (that I'm trying to improve all the time) to get an estimated moneyline on each game. Expressing that moneyline in terms of each team's chances to win (example, a -150 favorite has a 60.0% chance to win), I compare my ML with the real ML. (To get the real ML I average Pinny's 2 moneylines -- example, a 130/140 ML says the favorite is 57.43% likely to win, which translates to a shade above ML -135).
The recordkeeping is based on the closing Pinny ML as best I can track it. I compare that with my ML. So if it closes at Pinny at that 130/140 and I give that favorite only a 51.6% chance to win, then ML-OFF system pick is the dog at a strength of 5.8% (57.43 minus 51.60), which is rounded to 6.
For the first half-month of the season, if we played every team where the ML-OFF was 5% or more, we'd have 71 plays, which went 31-40 straight up and 41-30 ATS and made a profit either way.
Again in this Block I, as in the testing I did with last year's results, the concept of plays being "too good" -- or my ML being "too far off" -- reared its head. So far in 2006-07, at 15% ML-OFF or higher, the results take a turn for the worse. Just playing the plays in the 5%-15% range would have gone 26-29 SU for +23.8 units, with ATS plays 34-21 (or about +11 units if all plays were 1 unit and juice was -110.)
This is promising, although on a small sample. It's a less-than-sexy approach in that you are asked to be on almost every big dog, and on a lot of unappealing teams. For example, so far it's featured these teams most:
POR 9x
MEM 7x
NY 6x
CHA, BOS 5x
ATL 4x
Also, because the power ratings are based on the last 10 games, these early results are still somewhat connected (on a decreasing basis) to part of last year's results. (I divided last season into 10 chunks to make up the "last 10 games" while the system gets started.) In the next couple of weeks the ratings will get to be all about this year.
Next post will have the summary, and the third post the daily data.
REPORT ON SEGMENT #2 OF SEASON (11.16.06 to 12.03.06)
(season is divided into ten equal segments)
The headlines:
1. The ML plays slowed down a little from their hot start, showing a modest loss (3.7 units) over the 97 plays since November 16. Still ahead about 18 units for the year.
2. The same teams ATS stayed very strong, hitting at 56.7% over the 97 plays and adding 10.9 units to the profit line. Now ahead about 19 units for the year.
3. The puzzling pattern continued -- it is not the plays where the Edgar ML is farthest from the real ML that are most profitable. Once again, somewhere around 15-20% off, profitability seems to drop off sharply.
FOR SEGMENT #2 ALL GAMES WHERE EDGAR ML IS OFF FROM PINNY CLOSING ML BY 5% OR MORE
ALL 97 PLAYS:
SU, 35-62, -3.70u
ATS, 55-42, +10.90u
SUBSETS 5%-10% Off
SU, 19-20, +8.97u
ATS, 27-12, +14.40u
10%-15% Off
SU, 9-23, -5.39u
ATS, 16-16, -0.80u
15%-20% Off
SU, 4-8, -2.60u
ATS, 8-4.+3.80u
More Than 20% Off
SU, 3-11, -4.68u
ATS, 4-10, -6.50u
===========================
FOR ENTIRE SEASON TO DATE
ALL 169 PLAYS:
SU, 63-104, +17.98u
ATS, 96-73, +19.35u
SUBSETS 5%-10% Off
SU, 34-40, +21.96u
ATS, 46-28, +16.60u
10%-15% Off
SU, 19-33, +5.46u
ATS, 31-21, +8.95u
15%-20% Off
SU, 7-15, -5.56u
ATS, 12-10, +1.50u
More Than 20% Off
SU, 5-16, -3.88u
ATS, 7-14, -7.70u
List of plays for this tenth of the season to follow.
DATE/TEAM/%GAP/ATS result/ML result
17-Nov WAS 6 LOSS -100
17-Nov MIN 7 LOSS -100
17-Nov NJ 8 WIN 178
17-Nov PHI 9 LOSS -100
17-Nov CHI 10 LOSS -100
17-Nov UTH 11 WIN 173
17-Nov TOR 13 WIN -100
17-Nov POR 14 LOSS -100
17-Nov NY 22 WIN 360
17-Nov MEM 23 LOSS -100
18-Nov HOU 5 LOSS -100
18-Nov UTH 5 LOSS 100
18-Nov CHA 6 LOSS -100
18-Nov POR 8 WIN 370
18-Nov NOK 8 WIN 129
18-Nov PHI 8 WIN -100
18-Nov TOR 9 WIN -100
18-Nov NY 10 LOSS -115
18-Nov SEA 10 LOSS -100
18-Nov MIL 14 LOSS -175
18-Nov MEM 18 WIN -100
18-Nov ATL 20 LOSS -148
19-Nov SAC 20 LOSS -100
20-Nov SEA 5 WIN 100
20-Nov TOR 8 WIN -100
20-Nov CHA 15 LOSS -100
20-Nov MEM 16 WIN 144
20-Nov NY 22 LOSS -100
20-Nov POR 28 LOSS -100
20-Nov GS 29 WIN -100
21-Nov DEN 6 WIN 100
21-Nov NOK 7 WIN 100
21-Nov MEM 15 WIN -100
21-Nov PHI 18 LOSS -100
22-Nov ATL 5 WIN -100
22-Nov UTH 7 WIN 173
22-Nov SEA 8 WIN 220
22-Nov GS 12 LOSS -185
22-Nov NY 13 LOSS -100
22-Nov NOK 13 LOSS -100
22-Nov TOR 17 WIN 116
22-Nov POR 25 WIN 160
24-Nov DAL 5 WIN 193
24-Nov IND 5 WIN 100
24-Nov MIN 5 WIN 178
24-Nov PHI 9 WIN 107
24-Nov CHA 10 LOSS -100
24-Nov SAC 11 WIN 240
24-Nov MEM 18 WIN 122
25-Nov PHI 7 LOSS -100
25-Nov ATL 8 LOSS -100
25-Nov POR 8 LOSS -100
25-Nov NOK 9 LOSS -100
25-Nov CHA 13 LOSS -145
25-Nov MIN 14 WIN 127
25-Nov GS 14 WIN 107
25-Nov MEM 17 WIN -100
25-Nov NY 25 LOSS -100
26-Nov DEN 6 WIN -100
26-Nov TOR 10 WIN 100
26-Nov SEA 21 LOSS -100
26-Nov POR 22 LOSS -100
28-Nov TOR 8 WIN 165
28-Nov ATL 11 WIN -100
28-Nov CHA 11 WIN 270
28-Nov MIN 13 WIN -100
28-Nov NY 14 LOSS -100
28-Nov MEM 14 WIN 400
28-Nov POR 9 LOSS -100
29-Nov ATL 6 WIN 100
29-Nov BOS 12 LOSS -136
29-Nov MEM 12 LOSS -100
29-Nov NY 14 WIN 490
29-Nov UTH 14 WIN 110
29-Nov HOU 18 LOSS -100
29-Nov TOR 25 LOSS -100
30-Nov MIA 14 WIN -100
1-Dec TOR 6 WIN 100
1-Dec IND 6 WIN -100
1-Dec NY 9 WIN -100
1-Dec MIN 9 LOSS -116
1-Dec POR 9 WIN -100
1-Dec SAC 10 LOSS -100
1-Dec CHA 11 LOSS -100
1-Dec MIL 12 WIN -100
1-Dec NOK 14 LOSS -100
1-Dec ATL 23 LOSS -100