Sunday, July 26, 2009

An Honourable (Near) Draw

Investors with the Recommended Portfolio should probably be thankful that they escaped the weekend with just a small loss (0.4%), leaving them still up 4.0% on the season. Melbourne's inability to beat the Swans was the cause of most damage, though the Dons' narrow failure to pip the Tigers didn't help, nor did Freo's inability to cover their 8.5 point spread.

Other Investors lost too, MIN#001 and MIN#015 also only narrowly, and MIN#002 a little more substantially. MIN#017 was the only Investor to show a profit on the weekend. MIN#001 and MIN#015 are now up 7.2% for the season, MIN#002 is up 31%, and MIN#017 is up 38.5%.

Two Funds made profit on the weekend. New Heritage made almost 7% from 5 successful bets out of 6, leaving it ahead by 38.5% on the season, such profit deriving from 50 successful bets out of 66 wagers. Line Redux made 4% from its 2 out of 3 performance, leaving it down just over 1.5% on the season based on 25 successful wagers from 49 bets.

Prudence landed 4 bets from 6 but dropped 1.5% and is now up a little over 12% on the season with a 47 from 63 record. Hope won 1 and lost 1 to drop 4.4% but remains 31% ahead on the season with a 10 from 22 record. Chi-squared landed 3 from 4, but lost the one that mattered and so dropped 8% on the round to move to a loss of 55% on the season due to just 12 successful wagers from 25.

On tipping, BKB had the best performance of the round, snaring 7 from 8 to move to 95.5 from 136 (70.2%), joining Shadow on that score thanks to Shadow's paltry 2 from 8 for the week. Silhouette managed 5 from 8 and continues to lead, now by just 3 tips on 98.5 from 136 (72%).

Chi and ELO both had unremarkable line betting weekends, each bagging 4 from 8.

Chi continues to threaten the 30 points per game Mean Absolute Prediction Error (MAPE) landmark. He's now on 30.2 points per game; ELO's on 28.1 and BKB's on 27.2. As a measure of margin-tipping accuracy, MAPE is a good one, though it is subject to the distorting influence of a view blowout results. A measure that is less susceptible to such results, and one that is therefore preferred by some as a measure of margin-tipping accuracy is the Median Absolute Prediction Error.

For Chi, this measure is 26 points, for BKB it's 23.5 points, and for ELO it's 21.5 points, highlighting just how accurately ELO's been tipping margins this season.

Over on MAFL Stats you can view the latest MARS Ratings and there you'll see that the Saints have grabbed the number 1 ranking from the Cats for the first time this season. Given the Cats' patchy performances over the last month, I think that's probably a fair assessment.

A team-by-team comparison of results also highlights the Saints' superiority, especially against teams higher on the ladder:


In this table results in green are victories and those in red are losses. Where a team is to be played in a future round the details are shown in black. The teams are ordered by current ladder position.

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