Why I Don’t Believe in the Hybrid Advice Model


Editor’s note: This is a guest post from the CEO of LendingRobot, Emmanuel Marot. The views expressed in this post are his own and do not necessarily reflect the views of Lend Academy.

Hybrid human/robo advisors are all the rage now, with several key players expected to announce a hybrid solution in the forthcoming months.

On paper, it looks pretty good: let the robot do the simpler stuff, like a modern-portfolio-theory allocation between a few ETFs, and have a human being intervene to provide more sophisticated and personalized advice.

In practice, I think it’s nonsense. If you believe the market is truly efficient, then there’s no point in using an advisor, robot or human. Just invest in a broad market ETF and be done with it (except for tax harvesting).

If you think the market is efficient-ish, then low cost optimization is the solution. Go robot. If you think you need an active manager, you should read the trove of statistical analysis that demonstrate you’re simply paying for someone’s yacht. Indexes beat stockpickers [92% of time]… But even if you’re still in need of human intervention (or if you’re willing to pay a lot of money for smart-sounding but after-facts market analysis) ask yourself the question: how good can investment advice be when they’re cheap? It’s hard enough to find someone actually generating value, finding someone willing to do that for cheap in a corporate environment is like finding a virgin nymphomaniac.

It does make sense for robo-advisors to move to the hybrid model, since it allows them to differentiate and de-commoditize their service, but for their clients, not so much.

Don’t get me wrong, associating humans and machines can be shockingly efficient. The best chess teams are hybrid. PayPal famously used a mix of algorithms and human judgements to identify fraud. But investment advising, at least at the scale sought by robo-advisors doesn’t require truly personalized products. It’s like your banker asking you tons of questions, and ending up advising you to invest in the one fund they’re pushing nowadays, anyhow.

How many factors should be taken into account? Risk tolerance, time horizon, and maybe the accrual / disbursement rhythm. Factoring these in a broader investment algorithm is easy. Not trivial, but easy. And once it’s coded it becomes infinitely scalable, fully traceable. It can also be improved over time without any human retraining.

Machine learning algorithms have become so good in the last 10 years, that any number-crunching and quantitative decisions a smart but junior employee can do, the machine will do better, faster, and cheaper.

Big parts of the finance industry are built on convincing clients they need sophisticated services. Because it’s easier to sell an expensive service if it looks complicated. Neither complexity nor human whims have proven to bring any value.

Or, as a human adviser would say “this alpha-seeking strategy, when conjugated with a beta-stable position, is successful in 5% of the case, with a 5% error margin.”  Because so far, that’s one of the few areas where humans are vastly superior to robots: spouting meaningless justifications.

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