In the movie Office Space, Peter Gibbons has a stroke of genius. Confronted with the utter mundanity of a life slaving away at his office park software company, he convinces his friends to make a computer virus to skim a fraction of a cent off transactions into a shared bank account.
This, of course, goes horribly wrong. But the concept is actually pretty solid.
In the real world, where there are literally billions of transactions crisscrossing the globe every day, you can make a big profit buying and selling securities whose prices barely differ.
But heres the key. You have to be fast. Inhumanly so. Enter physics and computers.
Computerized high-frequency trading was born from a collision of rapidly growing computing power and an influx of math and physics PhDs into finance. These wonks worked out complex quantitative buy-sell strategies, built them into algorithms, and set their software loose.
While the practice is nothing if not controversialand there are quantitative strategies that work over longer time frames tooits impact on the market is undeniable. In any given year, high-frequency trading is responsible for up to half or more of all trades. And of course, notoriously, such algorithmic trading was also involved in 2010s infamous Flash Crash.
But all this is only the beginning of how physics and computers can flip finance upside down.
At Singularity Universitys Exponential Finance Summit this week, Andrew Fursman said quantum computers, which harness natures most basic laws, are coming sooner than you think. And while digital computing was an evolution, quantum computing will be a revolution.
Fursman is CEO and cofounder of 1Qbit, a quantum computing software startup focused on making quantum computing applications practical for industry.
Quantum computing, he said, is just in its earliest stages, more akin to the hulking special-purpose computers of the 40s and 50s instead of the sleeker personal digital machines of recent decades. But he thinks its about to get practical, and itll pay dividends to those paying attention.
In finance, computing power is really a bit of an arms race, Fursman said. And as you all know, in many of these situations, it's winner takes all.
The next revolution has been a long time coming. It began with physicist Richard Feynman.
When modern digital computers were just gaining momentum, Feynman looked far down the roadhe was a genius theorist after alland noted the most powerful computers would not be digital, theyd be quantum. That is, theyd harness the laws of nature to compute.
Its counterintuitive to think of the world as a computer, said Fursman, but its an instructive analogy if you want to grasp the speed and simultaneity of quantum computers.
Complexity is nothing to nature. Just imagine how quickly and effortlessly glass breaks, he said.
In far less time than it takes to blink your eye, the laws of nature instruct the atoms in the glass to fracture into a massively complex spider web. Not unlike a computer, the laws of physics are the underlying logic allowing the glass to compute its complex demise in an instant.
Quantum computers similarly harness natures power to compute. Instead of using 1s and 0s to calculate things, they use the rules of quantum mechanics to compute with 1s, 0s, and both simultaneously. This means they can rapidly solve massively complex problems.
[Go here to learn more about how quantum computers work.]
But todays machines, like D-Waves adiabatic quantum computers, arent like your laptop, which is whats called a universal computer due to its ability to do many tasks. Instead, quantum computers today are specialized, complicated, difficult to program, and expensive.
Fursman thinks well get universal quantum computers in future, but well before then, in something like three to five years, he thinks early quantum computers will get practical. And because they can do things no other computer can, theyll be powerful.
In finance, its often about optimization. And todays quantum machines excel at optimization.
Consider building a portfolio out of all the stocks in the S&P 500, Fursman said. Given expected risk and return at various points in time, your choice is to include a stock, or not. The sheer number of possible portfolio combinations over time is mindboggling.
In fact, the possibilities dwarf the number of atoms in the observable universe.
To date, portfolio theory has necessarily cut corners and depended on approximations. But what if you could, in fact, get precise? Quantum computers will be able to solve problems like this in a finite amount of time, whereas traditional computers would take pretty much forever.
The work is already underway to make this possible.
Fursman noted a paper written by Gili Rosenberg, Poya Haghnegahdar, Phil Goddard, Peter Carr, Kesheng Wu, and Marcos Lpez de Prado in which they outline a new way to solve for an optimal portfolio. Instead of finding the best portfolio at discrete times in the future, they outline a way to find the best portfolio overall through time. Such a portfolio would reduce the transaction costs of rebalancing portfolios and potentially save the industry billions.
To be clear, this isnt ready for prime time yet. But Fursman thinks it will be shortly. The key? Their proposed portfolio optimization method is compatible with existing quantum computers. Specifically, they looked at D-Waves adiabatic machines, and according to the paper, they believe it can scale up in complexity as the underlying technology improves.
It's something that has real ability to impact what's possible within your industry and to make money doing all the things you already dobut in completely new ways, Fursman said.
Exponential Finance, according to Fursman, is a bit ahead of the curve. The event has focused on the possibility of quantum computing in finance for the last several years.
But now, its poised to make an impact. Google recently announced they expect to achieve quantum supremacy by the end of this year. That means theyll have shown a quantum computer capable of solving a problem no conventional computer can.
Fursman thinks the slowing of Moores Law may be lulling some into complacency. Whereas at one point you could barely keep pace, even if you bought a new computer every year; these days, the computer you bought four years ago is basically stillable run whatever you want today.
But for businesses, the pace of progress is about to speed up again.
The quantum computing industry [today] is just [the] spark. Its just the very, very beginning of whats going to be possible, Fursman said. Those sparks are going to turn into a huge explosion, and all of a sudden, youre going to be faced with incredible amounts of computing capabilities that directly tackle the types of problems most relevant to what youre doing.
This isnt going to take 20 years, he said, or even ten years. Itll be here in three to five years. So, now is the time to start thinking about what quantum will do for you.
Image Credit: Shutterstock
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