The Dark Knight Capital Rises

Knight Capital lost $10m a minute. Bane could learn a thing or two.

Spoilers for The Dark Knight Rises follow.

While the obvious cinematic comparison with an automatic trading system going rogue for inexplicable reasons and losing its owners $440m in just 45 minute may be the Skynet system of the Terminator series, we can't help but be a little reminded of a key scene in the apex of Christopher Nolan's Batman trilogy.

Bane, the goatse-mouthed villain who sounds like an evil Father Christmas, breaks into the Gotham Stock Exchange, kills some guy, and then proceeds to use all manner of mild technowizardry to make huge amounts of bad trades under Bruce Wayne's name, bankrupting him and forcing him to relinquish his place on the board of Wayne industries.

Now, even in the film as it stands, it's not entirely clear why actually does that, as his next action involving the board is to storm in and force them to hand over a fusion reactor at gunpoint, something which he could have done with Wayne present. Nor is it really explained why Gotham Stock Exchange didn't just roll back any transactions made in the period when a gun-toting madman was holding the exchange hostage and executing obviously illegitimate trades, as the New York Stock Exchange did after Knight Capital's algos went a bit crazy on Wednesday. 

But really, we now know that Bane didn't have to do anything at gunpoint at all. If he had just got hold of Wayne's computer-aided trading wing – and come on, Bruce built a computer which could spy on an entire city using intercepted mobile phone transmissions, don't try to tell us that he didn't do computer-aided trading – he could have lost him almost $200,000 a second in untraceable, unrollbackable, instant transactions which would have left his corporate reputation in tatters. Silly Bane.

Knight Capital itself certainly isn't doing much better than Wayne Enterprises. That $440m it's lost, from selling all the stocks it accidentally bought during its computer glitch, easily surpasses the company's entire quarterly revenue for last quarter. Its own shares were down 75 per cent on their Wednesday morning peak, and are likely to fall further today. It has made itself the target of hostile takeover rumors, and probably irretrievably damaged its reputation for being a safe pair of hands. For a company which once handled 11 per cent of all American stocks, it's an ignominious fall from grace.

Bane: Surprisingly inept at losing large amounts of other people's money.

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

Show Hide image

Tetris and sleep deprivation: how we can help emergency workers cope with trauma

First responders are at serious risk of developing PTSD during events like the Paris attacks. 

Some people seem able to deal with anything. They save a stranger from bleeding out in a bombed restaurant, protect passers-by from heavily armed gunmen, pull dead and dying people out of collapsed buildings, and they keep going because it is their job. These people are first responders.

When trauma goes on for days, as it has recently in Paris, however, the odds of them bouncing back from the violence, death and injury they are witnessing rapidly diminishes. They are at greater risk of developing a severe stress reaction known as post-traumatic stress disorder (PTSD). One study found that the worldwide rate of PTSD among first responders is 10 per cent, much higher than the 3.5 per cent rate among those not involved in rescue work.

Tetris to the rescue

So how best to address the problem? Research is in its infancy, but there are some promising studies. Emily Holmes’ group at the University of Cambridge has been looking at the benefits of playing Tetris, a video game, after a traumatic experience. The idea is that this could block the consolidation of traumatic memories so they don’t “flash back” later on.

For the study, her team first traumatised people by showing them distressing footage from public safety videos. The next day they invited them back into the lab to reactivate the memories with still images taken from the videos. One group then played Tetris for 12 minutes while the other sat quietly. Over the following week, the group who played Tetris had about 50 per cent fewer unwanted memories from the films compared to the group who didn’t.

The team concluded that playing Tetris helped individuals because it soaks up their visual processing capacity, making it harder for the brain to consolidate the visual parts of a traumatic memory.

Since it takes about six hours for the brain to cement a memory, the key is to play the game soon after trauma or within six hours of re-activating the traumatic memory. How long the helpful effects of playing Tetris will last and whether it will translate into helping people after real-life trauma is still unknown.

Talking it through

Other techniques, such as “updating”, taken from a highly-effective talking treatment for PTSD, may be more practical and easier to implement.

Like a detective, updating is a technique that focuses on finding new information and linking it to the case, the past memory. This is necessary because when the brain and body are in survival mode during trauma, the mind finds it difficult to encode all the relevant facts. Often key pieces of information that could make the memory less traumatic are lost. Updating links new information to someone’s memory of their trauma to make it less upsetting.

But can updating help to reduce unwanted memories after trauma?

We carried out a study, published in PLOS ONE, in which we traumatised people by showing them terrifying films of humans and animals in distress. We then divided our participants into three groups. One group watched the films again but were given new information about how long people suffered and whether or not they lived or died – essentially, they were updated. The second group watched the same films again but without the new information. And the third group watched films of humans and animals who were not in distress. The updated group had fewer traumatic memories and PTSD symptoms than the other two groups.

Updating is now being used by some UK emergency services. First responders will gather after critical incidents and update their memories of what happened before they go home.

Sleep deprivation

There are other techniques that may be helpful. One study found that depriving people of sleep may be useful in the aftermath of trauma.

But the same study found that a week after the trauma, people who had been deprived of sleep had the same number of unwanted memories as people who had slept well afterwards. Consequently, it remains unclear whether there would be any long-lasting benefits using this method. There are, however, certainly health risks linked to lack of sleep.

Still looking for a solution

To develop preventative interventions, we need to study newly-recruited emergency workers who haven’t yet suffered on-the-job trauma and follow them over time, spotting which “coping styles”, present before trauma, may predict their reactions afterwards.

For example, some people naturally react to stressful life events by dwelling on them, thinking about why they happened for hours on end. This strategy, called rumination, has been linked to PTSD in people who survived car crashes.

If rumination predicts PTSD in first responders, then preventative interventions could train people to spot when they are dwelling on an event and refocus their attention to the task at hand.

When we have identified which factors heighten emergency workers’ risk of developing PTSD, programmes can be developed to target those vulnerabilities. Only then can an intervention, directed at first responders most at risk of developing PTSD, properly protect them in their line of work.

The Conversation

Jennifer Wild is a Senior Research Fellow in Clinical Psychology at the University of Oxford

This article was originally published on The Conversation. Read the original article.