Foreign exchange platform puts the brakes on high-frequency traders

EBS has changed its rules to discourage algobots.

EBS, a major interbank trading platform in in the foreign exchange market, is considering imposing a major change in the way it runs its market in order to discourage high-frequency trading from taking place.

EBS currently runs on the principle of "first in, first out" trading, where trades are dealt with in the exact order they are made. That is the way most people expect the market to work – but it also gives an advantage to those who can get their trades in quickest. That leads to the arms race that high-frequency trading has seen in the last few years, where traders pay to place their servers close to the exchange, to whittle off those last few microseconds.

Instead of this model, EBS is considering bundling together incoming trades and dealing with them in a random order. That way, every trade that came in in (for example) the tenth of a second between 12:00:00.0 and 12:00:00.1 would be grouped together and dealt in a random order, removing the advantage that the trader who got in at 12:00:00.01 would normally have.

Speaking to the FT, the chief executive of EBS explained why the company has made the decision:

The first twenty years of algorithmic trading have added great transparency and led to the compression of spreads – all great things. But there is a line beyond which marginal speed and smaller trade sizes add no value and actually harm the markets. At some point we, the public markets across asset classes, crossed that line.

The ‘first in, first out’ model sounds fair and plausible, but in modern public markets it implies ‘winner takes all’.

The classic example of how high(er)-frequency trading can have positive effects comes from the fact that the desire to shave seconds off the response time to financial information is the reason why the undersea cables linking London to New York are so high quality. Without that motivation to profit, the cables might not have been laid for decades after, and certainly wouldn't be as fast as they are now. (In fact, the USD/GBP exchange rate is still known as "cable" now, after the first transatlantic cable laid in 1858).

But as the speed of trades has increased ever higher, the side-benefits are shrinking. The difference in liquidity between a market where a tenth of a second and a thousandth of a second matters is minuscule; even if spreads might be a tiny bit tighter than they otherwise would be, no normal trader is helped by that "improvement".

So EBS's speed limit is a welcome step. By dealing with trades in a semi-random order, it removes the incentive to spend millions on shaving off the smallest fractions of time. Ironically, the companies which will benefit most in the short term are the high-frequency traders themselves, who already have the technology to trade speedily, and now don't need to worry about investing more on ever-diminishing returns. But eventually, more and more traders will match that capability, until the market becomes a level playing field again.

The other reason why traders – even high-speed ones – ought to thank EBS is that if the exchanges get HFT under control, then there's one less reason for governments to step in. Discouraging high-frequency trades is one of the strongest reasons for introducing a financial transaction tax. That hits everyone, not just the speedy traders.

A new data-centre in Manhattan. Photograph: Getty Images

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

All photos: India Bourke
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“They cut, we bleed”: activists Sisters Uncut protest closures of women's services

 “Our blood should not pay for our rape.”

Over 500 domestic violence survivors and support workers processed through central London this weekend. The protest, staged by the feminist direct action group Sisters Uncut, mourned the women’s services that are losing out as a result of the government's austerity drive.

Since November 2014 the group has occupied streets, burned copies of the Daily Mail, and hijacked the Suffragette film premiere. But on Saturday the mood was somber. In Soho Square the group staged a symbolic funeral service. Attendees stood in a protective circle, fists raised, while members took turns to read out the names of the scores of women who’ve been killed by men in the past year:  “Anne Dunkley, 67; Nadia Khan, 24; Lisa Anthony, 47…”. The youngest was just 14 years old.

The service culminated in a promise “to never forget” the dead, and also to protect the living: “We must love and support one another; we have nothing to lose but our chains".

As the protestors passed St Martins in the Fields Church, dressed in black veils and funeral attire, the crowd of passers-by broke into spontaneous applause. “It gave me goosebumps”, Caroline, an activist and former victim of abuse told me. “You expect people on the march to be supportive but not the people on the street. I’ve been on other marches and people normally complain about you being selfish and blocking up the streets but this response makes you feel like people do  care.”

The show of public support is especially welcome in the aftermath of the Chancellor’s Autumn Statement. Cuts to local authority budgets have already led to the closure of over 30 domestic violence services since 2010, including Eaves, a charity that provided services for single, low-income and vulnerable women.

Further erosions to local council budgets will only put more services and lives at risk, activists say. Also of concern is Osborne’s decision to devolve responsibility for raising a social care tax (of up to 2 per cent on council tax) to local authorities. This tips hostility to tax increases away from central government to local authorities, and could place greater pressure on women’s services to compete for funding.

The Chancellor offered a supposed silver lining to the cuts with the promise that VAT money raised from the EU’s compulsory tax on sanitary products will be ringfenced for women’s charities, such as the Eve Appeal and Women’s Aid.

The implication, however, that only women are to pay for helping the victims of domestic violence was met with derision from Sisters Uncut. As the marchers approached their final destination in Trafalgar Square, red dye turned the square’s famous fountains the colour of blood. “This blood won’t wash the blood from Osborne’s hands,” read one tampon-draped banner; “Our blood should not pay for our rape”, read another.

For those on the march, the cuts are an affront on many levels. All those I spoke to worked in some form of public service; everything from housing to foster care. But some have had to move out of the women’s services sector for the lack of funding.

Louisa used to work for a domestic violence service in London until it was forced to close last month. “I’m here because I’ve witnessed first hand what the cuts are doing to women and how much the organisations are having to squeeze what they can provide.”

All public services have legitimate claims to support - from the 14-strong police team that escorted the marchers, to the sweepers who were left to dredge the protesters’ roses out of the fountains and brush away the tampons that had fallen from their banners.

The danger, however, according to Caroline, is that the needs of domestic violence victims are all too easy to sideline: “This is by its nature something that goes on behind closed doors,” she says. As funding tightens, these voices musn’t be squeezed out.

Sisters Uncut is an intersectional group open to all who identify as women. The national domestic violence helpline offers help and support on 0808 2000 247. Members of the LGBT communities can also access tailored support from Broken Rainbow on 0800 9995428.

India Bourke is the New Statesman's editorial assistant.