Funded Futures Financial Services | 3 November 2026

Owning the Index in Horse Racing

“I don't follow horse racing. But I've just watched the best case for index investing play out at Flemington.” Matthew Timms (Financial Adviser who knows nothing about gambling)

What happened

On Melbourne Cup day, trainer Ciaron Maher produced the first three horses home: Point Of Law, Zahrann and Juja Kibo. He also trained the fifth and sixth, which makes five of the first eight across the line from one stable. Joseph O'Brien trained two more in the top eight, and one place went to a third trainer, who we assume is feeling left out.

The index fund of horse racing

Every equity investor knows the lesson: don't try to pick the winner, own the market. Applied to Flemington, that means don't back a horse, back the stable. Spread your money across many holdings, keep your costs down, and let one very good trainer do the work.

Here is the fund's top eight holdings, as at the finish line:

Fund facts, for the brochure nobody will read:

•     Tracking error: negligible, given the fund and the winner were the same stable.

•     Management fee: one trainer, paid in whatever trainers are paid in.

•     Rebalancing: only when a horse is scratched.

•     Top holding weight: five of the first eight places, or 62.5%.

Meanwhile, the active managers

Across the country, millions of active managers were hard at work. Their research process was rigorous: the horse with the best name, the jockey in the nicest silks, a number that came to them in a dream, a tip from a bloke at work who “knows someone”.

These managers believe they have an edge. Some of them do have a story about the time they picked the winner, which they will tell you at length. None of them mention the other 22 horses.

The active approach has a long history and a rich culture. It also has a bookmaker.

The catch

The investment works right up until you check it against what an index actually is. Three problems:

1.     One trainer isn't an index, it's a concentrated bet. An index spreads your money across the market so no single holding sinks you. Five of the top eight horses from one stable is the opposite: a single decision-maker holding most of the portfolio. Maher also had the largest contingent of nominations, with 14 horses, and the favourite won. That's a fund manager with a big position in the best idea, not a market.

2.     Owning the whole field loses money by design. Share markets pay you for owning everything because the businesses produce profits over time. A betting market pays out less than was put in, because the bookmaker takes a cut of every dollar. Back every horse in the race and the cut is the one thing you're guaranteed.

3.     You'd have had to know the trainer in advance. Choosing the right stable before the race is stock-picking with extra steps. Choosing it after the race is just reading the results.

The real lesson is closer to home. Diversification means owning many things that don't all win or lose together. Australian share indexes are themselves weighted heavily towards a handful of large companies, which is worth knowing before you call a portfolio diversified. On Cup day, a whole field of 23 turned out to have a lot riding on the same stable.

The National Gambling Helpline in Australia is 1800 858 858, offering free, confidential support 24/7 for anyone affected by gambling.

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Sources

•     ABC News, Melbourne Cup 2026 finishing order from first to last

•     races.com.au, Melbourne Cup 2026 winner Point Of Law heads all Maher trifecta

•     VRC, 101 nominations received for the 166th Lexus Melbourne Cup

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