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.

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Winning Scottish independence will be even harder than before - but it may be the only choice

Independence campaigners will have to find answers on borders, currency and more. 

The Brexit mutiny has taken not just the UK economy and its relationship with Europe into uncharted waters. it has also imperilled the union between Scotland and England. From Sir John Major to the First Minister, both Unionists and Nationalists had warned of it. The outcome, though, has made this certain. The Leave vote in England and Wales contrasted with an overwhelming Remain vote north of the border.

That every region in Scotland voted to stay In was quite remarkable. Historically, fishing and industrial communities have blamed the European Union for their woes. That antagonism was probably reflected in lower turnout - an abstention rather than a rejection. 

The talk now is of a second referendum on independence. This is understandable given the current mood. Opinion polls in the Sunday Times and Sunday Post showed a Yes vote now at 52 per cent and 59 per cent respectively. Moreover, anecdotal evidence suggests even arch No vote campaigners, from JK Rowling to the Daily Record, are considering the option.

The First Minister was therefore correct to say that a second referendum is now “back on the table”. Her core supporters expects no less. However, as with the economy and Europe, the constitutional relationship between Scotland and England is now in uncharted seas. Potential support for independence may be higher, but the challenges are arguably bigger than before. The difficulties are practical, political and geographic.

Of course the Little Englanders likely to take the helm may choose a velvet divorce. However, given their desire for the return of the Glories of Britannia that’s improbable. They’re as likely to wish to see Caledonia depart, as cede Gibraltar to Spain, even though that territory voted even more overwhelmingly In.

Ticking the legal boxes

Practically, there’s the obstacle of obtaining a legal and binding referendum. The past vote was based on the Edinburgh Agreement and legislation in Westminster and Holyrood. The First Minister has indicated the democratic arguments of the rights of the Scots. However, that’s unlikely to hold much sway. A right-wing centralist Spanish government has been willing to face down demands for autonomy in Catalonia. Would the newly-emboldened Great Britain be any different?

There are no doubt ways in which democratic public support can be sought. The Scottish Government may win backing in Holyrood from the Greens. However, consent for such action would need to be obtained from the Presiding Officer and the Lord Advocate, both of whom have a key role in legislation. These office holders have changed since the first referendum, where they were both more sympathetic and the legal basis clearer. 

Getting the EU on side

The political hurdles are, also, greater this time than before. Previously the arguments were over how and when Scotland could join the EU, although all accepted ultimately she could remain or become a member. This time the demand is that Scotland should remain and the rest of the UK can depart. But will that be possible? The political earthquake that erupted south of the Border has set tectonic plates shifting, not just in the British isles but across the European continent. The fear that a Brexit would empower dark forces in the EU may come to pass. Will the EU that the UK is about to leave be there for an independent Scotland to join? We cannot know, whatever European Commission President Jean-Claude Juncker may be saying at the moment. The First Minister is right to start engaging with Europe directly. But events such as elections in France and the Netherlands are outwith her control. 

Moreover, currency was the Achilles heel in the last referendum, and hasn’t yet been addressed. George Osborne was adamant in his rejection of a currency union. The options this time round, whether a separate Scottish currency or joining the euro, have yet to be properly explored. A worsened financial situation in the 27 remaining EU members hampers the latter and the former remains politically problematic. 

The problem of borders

Geography is also an obstacle  that will be even harder to address now than before. Scotland can change its constitution, but it cannot alter its location on a shared island. In 2014, the independence argument was simply about changing the political union. Other unions, whether monarchy or social, would remain untouched. The island would remain seamless, without border posts. An independent Scotland, whether in or out of the EU, would almost certainly have to face these issues. That is a significant change from before, and the effect on public opinion unknown.

The risk that's worth it

Ultimately, the bar for a Yes vote may be higher, but the Scots may still be prepared to jump it. As with Ireland in 1920, facing any risk may be better than remaining in the British realm. Boris Johnson as Prime Minister would certainly encourage that. 

David Cameron's lack of sensitivity after the independence referendum fuelled the Scottish National Party surge. But perhaps this time, the new Government will be magnanimous towards Scotland and move to federalism. The Nordic Union offers an example to be explored. Left-wing commentators have called for a progressive alliance to remove the Tories and offer a multi-option referendum on Scotland’s constitution. But that is dependent on SNP and Labour being prepared to work together, and win the debate in England and Wales.

So, Indy Ref The Sequel is on the table. It won’t be the same as the first, and it will be more challenging. But, if there is no plausible alternative, Scots may consider it the only option.

Kenny MacAskill served as a Scottish National MSP between 2007 and 2016, and as Cabinet Secretary for Justice between 2007 and 2014.