January 15, 2015ForexHistoric

The Swiss Franc Shock (SNB De-Peg)

Year

2015

Region

Switzerland / Eurozone (global FX)

Markets

Forex، Prop Risk، Macro

Crisis

Currency Shock، Volatility Spike، Liquidity Crisis، Leverage Unwind، Depeg

Severity

Historic

Reading

4 min

Sources

Core lesson

A stop-loss is a request to exit at the next available price, not a guarantee of your level. In a gap, the next available price can be far away — or nonexistent for a moment — so your real risk is the gap, not the distance to your stop.

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⏱ 30-second summary

The Swiss National Bank scrapped its EUR/CHF floor without warning; the franc jumped ~30% in minutes and blew up brokers and traders.

Timeline

2011-09-06
SNB sets the 1.20 floor
To stop the safe-haven franc from strengthening during the eurozone debt crisis, the Swiss National Bank pledges to enforce a minimum EUR/CHF rate of 1.20, buying unlimited euros if needed. Traders begin treating the floor as a near-guarantee.
2014-12 to 2015-01
Defending the floor gets too expensive
As the euro weakens and the ECB moves toward quantitative easing, holding the line forces the SNB to buy euros in rapidly rising amounts. The peg is becoming unsustainable, though the bank publicly reaffirms its commitment days before.
2015-01-15 09:30 CET
The floor is scrapped without warning
The SNB announces it is discontinuing the 1.20 minimum exchange rate "with immediate effect" and cutting its policy rate to -0.75%. There was no prior signal; the decision blindsided the market.
2015-01-15 (minutes later)
Franc gaps ~30% with almost no prices in between
EUR/CHF collapses through 1.20 and briefly trades below parity, the franc spiking by roughly 30% (and over 40% at the extreme intraday low) in minutes. Liquidity vanishes; stop-losses fill far away from their levels or not at all.
2015-01-16
Brokers fail; FXCM rescued
Alpari UK enters insolvency and Global Brokers NZ shuts down as client losses exceed account equity. FXCM reports clients owe about $225m in negative balances and takes a $300m emergency loan from Leucadia National to meet capital requirements.

What happened?

For years the SNB had promised to cap the franc at 1.20 per euro. Traders treated that floor as a near-certainty and sold the franc with heavy leverage, collecting small gains.

On January 15, 2015 the SNB abandoned the cap with no warning. EUR/CHF gapped about 30% in minutes — there were almost no prices in between. Stops could not fill, accounts went negative, and at least one large broker became insolvent. This is the defining modern lesson in gap and leverage risk for retail FX.

Why markets reacted

The reaction was so violent because the floor had become a one-sided crowded trade. For more than three years the SNB had effectively promised it would not let EUR/CHF fall below 1.20, so a huge mass of traders sold the franc with heavy leverage, treating it as a low-risk way to collect small, steady gains. When the promise was removed without warning, everyone tried to exit the same trade at the same instant.

With the central bank no longer buying euros, there was almost no one on the other side to absorb the selling. Liquidity (Liquidity) disappeared and the price jumped roughly 30% in minutes with virtually no tradable prices in between. That gap, combined with leverage, is what turned a policy headline into account wipeouts and broker insolvencies, rather than an orderly repricing.

What traders usually get wrong

Believing a tight stop-loss capped their risk. Many had stops at, say, 1.19 and assumed the worst case was a small loss — but the price never traded there; it jumped straight past, so fills were tens of figures lower.

Treating the SNB floor as risk-free carry. Because the trade 'worked' every day for years, people scaled up leverage rather than down, mistaking a long quiet period for low risk.

Assuming a central-bank commitment was permanent. The SNB had publicly reaffirmed the floor just days earlier, and traders read that as proof it was safe rather than as a sign of how strained the policy had become.

Ignoring broker and gap risk entirely. Few asked what happens to their account — or their broker — if the move is bigger than any stop can handle and balances go negative.

The risk lesson for traders

A stop-loss is a request to exit at the next available price, not a guarantee of your level. In a gap, the next available price can be far away — or nonexistent for a moment — so your real risk is the gap, not the distance to your stop.
Leverage decides whether a gap is a scratch or a wipeout. The same 30% move ruins a 1:100 account but barely dents an unleveraged one. Size positions for the worst plausible gap, not the average daily range.
A 'guaranteed' or pegged price is a policy, and policies can be reversed overnight. Treat any floor, ceiling, or peg as something that can break the moment it becomes too costly to defend.
Broker and counterparty risk is real risk. When the move is big enough, negative balances pass from clients to brokers and some brokers fail — your account safety depends on the firm's capital and on negative-balance protection actually existing.

Practise this lesson in Map.Trade

Practice framework

Practice the pattern, not the exact event. Rehearse a sudden volatility spike and price gap to internalize the core lesson: a stop-loss is a request for the next available price, and leverage decides whether a gap is a scratch or a wipeout.

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