Remix.run Logo
HSBC Claims Quantum Trading Breakthrough(ft.com)
10 points by sgt101 13 hours ago | 7 comments
miles7 an hour ago | parent | next [-]

Not at all clear from the paper whether you need a quantum computer to do these calculations or whether the same circuits could be simulated classically.

(I.e. from what I can see the paper never mentions the amount of entanglement or complexity in the quantum state, or that they used state-of-the-art simulation techniques like tensor networks to check.)

If someone knows of a blog post, supplemental material, etc. that reports this I'd be curious to know.

qrios 9 hours ago | parent | prev | next [-]

https://archive.is/2025.09.25-054751/https://www.ft.com/cont...

sgt101 13 hours ago | parent | prev | next [-]

https://arxiv.org/pdf/2509.17715 for the paper.

- this is back testing. - the mechanism (from first skim) is to create features using the QC which are then fed to the classical algorithm.

dash2 11 hours ago | parent [-]

Can anyone explain why creating features with QC might be a good idea?

sgt101 6 hours ago | parent [-]

I am on really shaky ground, but I think that they are representing "uncertainty" in the QC sense per event and that they claim that over the totality of the events this then represents reality better than stochastic sampling.

But I've been reading the paper on and off today and I don't really understand much of it at all.

cedws 9 hours ago | parent | prev | next [-]

You can finally be honest when you tell your girlfriend you may or may not have lost the wedding fund on meme stocks.

ares623 12 hours ago | parent | prev [-]

Babe, wake up. New hype cycle just dropped