A British exit from the European Union could mean global markets fall but soon recover, with no big damage to the economy.
Or, it could be the crack that starts to break apart the European Union and unleashes forces of protectionism and nationalism that hurt world trade.
Such sharply different scenarios are featuring in experts’ predictions as they try to assess the risks for the wider world from Thursday’s referendum.
While they say a British exit from the EU — or Brexit, as it is known — would be painful mainly for the country itself and to a lesser extent for rest of the Europe, the consequences for the global economy are harder to estimate.
In the gloomier narratives, a Brexit becomes a turning point, an event that snowballs and leads to much larger and nastier problems. It could deal a setback to free trade and globalization, which many disgruntled voters around the world are already cool on. And it could trigger more defections from the 28-country EU free trade bloc, destabilizing the region and unsettling companies and consumers.
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So forecasts are ranging from the benign to the apocalyptic.
Some, like outgoing Finnish Finance Minister Alexander Stubb, compare Brexit to the 2008 collapse of U.S. investment bank Lehman Brothers, which spread financial ruin across the globe. Or, as analyst Timothy Ash from Nomura International suggests, it might be more like Y2K, in which computers worldwide were supposed to fail on Jan. 1, 2000, because software was written for years beginning with 19-.
In the event, not much happened.
Here’s a quick run-through of the global risks from a Brexit.
FLIGHT TO SAFETY
It’s reasonable to assume that a vote to leave would cause global financial market swings in the short term, with investors selling riskier assets such as stocks and seeking safety in government bonds, analysts say. The pound has already fallen in value against other currencies and would likely fall more. Gold, seen by some as a refuge in troubled times, might rise.
Markets seem to be betting that “remain” will win, so if they’re wrong, there could be some scrambling to adjust.
LOWER FOR LONGER
Central banks could try to steady things with extra loans for banks or other ways of making credit more readily available. Market swings could help persuade the U.S. Federal Reserve to postpone interest rate increases once thought likely this year and now in doubt. That could be good news for mortgage holders but could prolong savers’ agony over low rates and non-existent returns on deposits.
The direct impact of a Brexit would likely not be too bad on growth — if you’re not British. A year after a vote to leave, Britain’s economy would be one percent smaller than it would have been otherwise, while the 28-country EU would lose 0.25 percent and the world 0.1 percent, according to Moody’s Analytics chief economist Mark Zandi.
“I think the immediate effect is modest,” he said. “It’s not cataclysmic in any way. It’s corrosive, certainly. It diminishes the U.K. economy going forward.”
Taking 0.1 percentage point off global growth might not seem like much, but the world economy, though not in crisis, is not in great shape right now. The International Monetary Fund predicts 3.2 percent growth this year and 3.5 percent next year. IMF head Christine Lagarde says that’s not enough to lift living standards and get the globe’s 200 million unemployed back to work. “There is a risk that middle class families and the poor actually remain behind, which would embolden the voices of protectionism and fragmentation,” she said in April.
The “U-word” is prominent in most assessments of Brexit. That’s because it would take years for Britain to sort out new trade relationships if it leaves the EU, whose members trade freely with each other without tariffs and use the same product and safety standards. Businesses wouldn’t know where to locate production or how much it would cost to trade.
The EU and Canada, for instance, started negotiating a trade agreement seven years ago. It still hasn’t been ratified.
And uncertainty can be very hard on growth. It makes executives hold off on building new plants or hiring permanent employees, while consumers might wait on buying a new car or kitchen.
Uncertainty is one reason investment is relatively weak in the developed world. A Brexit would only add another reason to wait.
Again, it depends: if talks go smoothly, disruption could be contained, some think.
“If you have Brexit, at the end of the day, it’s in both sides’ interest to continue to work together,” said Jens Peers, chief investment officer of Mirova, the responsible investment subsidiary of Natixis Asset Management. “So if you have an initial (market) reaction, it’s probably going to be more a buying opportunity than a reason to panic.”
THE BUTTERFLY EFFECT
If other countries decide to leave the EU or if a “leave” vote energizes populist political forces and leads to a broader retrenchment in trade and globalization, a Brexit would be seen as a turning point with outsized influence on the globe.
Polls in France, for instance, show anti-EU candidate Marine Le Pen of the National Front will almost surely make the final round of next year’s presidential election. In the United States, presumptive Republican presidential nominee Donald Trump has criticized the North American Free Trade Agreement, or NAFTA, and talked about imposing new tariffs.
Economist Zandi invoked the metaphor of the butterfly that flaps its wings and triggers a chain of events that builds into a hurricane.
“Nothing good comes out of Brexit,” he said. “It’s just different shades of grey. It has global implications under the greyest scenarios, where Brexit sets off, is a catalyst for, another existential event for the eurozone and the European Union more broadly, that it empowers all the political centrifugal forces that are at work in Europe and Europe starts to fracture.”
“That would have serious implications for Europe, and also for the global economy,” he said. “It’s quite easy to construct scenarios where this plays out very badly over time.”