When a Currency Becomes Too Strong to Bear — FIN4006 Tutorial 4

When a Currency Becomes Too Strong to Bear

Government & Central Bank Intervention in FX Markets
FIN4006·TUTORIAL 4·[MEMBER 1]·[MEMBER 2]·[MEMBER 3]·[MEMBER 4]·[MEMBER 5]
01 / WHY INTERVENE
PRESENTED BY [MEMBER 1]

Why governments intervene

Export arrow snapping

Exchange rates shape exports, imports, inflation and employment

Appreciation eroding exports

Excessive appreciation erodes export competitiveness

Imported inflation tick rising

Excessive depreciation fuels imported inflation

CURRENCY STRENGTH
TOO WEAKORDERLYTOO STRONG
EXPORTS
100▼
IMPORTED INFLATION
2.0%▼
EMPLOYMENT
100▼
CONFIDENCE
100▼
THIS IS WHEN CENTRAL BANKS STEP IN.
STRONG CURRENCY
WEAK CURRENCY
Imports become cheaper
Imports become more expensive
Export competitiveness may weaken
Export competitiveness may improve
Lower imported inflation
Higher imported inflation
Overseas investment becomes cheaper
Foreign debt may become more expensive
So what exactly is inside the central bank's toolbox?
02 / THE TOOLBOX
PRESENTED BY [MEMBER 2]

The central bank's toolbox

TOOL 1
Direct FX operations — sell domestic / buy foreign to weaken; buy domestic / sell foreign to strengthen.
|
TOOLS 2 & 3
Supporting instruments — interest-rate policy and quantitative easing.
RATE READOUT · S(d/f)
1.0000▲ FOREIGN CCY DEARER
FX RESERVES
DOMESTIC SUPPLY
Foreign exchange market: demand for foreign currency shifts right, the foreign currency appreciates from S0 to S1 S(d/f) Qf Df Sf S₀ S₁ Df SHIFTS RIGHT
Domestic supply rises → downward pressure on its value.
S₀ → S₁ ▲ FOREIGN CURRENCY APPRECIATES · DOMESTIC CURRENCY WEAKENS
WEAKENING DOMESTIC CURRENCY
STRENGTHENING DOMESTIC CURRENCY
Sell domestic currency
Buy domestic currency
Buy foreign currency
Sell foreign currency
Domestic currency supply increases
Domestic currency supply decreases
Currency may depreciate
Currency may appreciate
Opposite directions, identical mechanics: weakening pushes the currency down, strengthening pushes it up WEAKEN ▼ STRENGTHEN ▲
Theory is clean. Reality is messier — Switzerland, 2011.
03 / SNB CASE
PRESENTED BY [MEMBER 3]

Case: the SNB weakens the franc

EUR/CHF 2011: the franc strengthens sharply, the SNB sells francs and buys euros, francs flood the market, and the franc weakens back EUR/CHF · RISING = CHF WEAKENING 1.20 1.05 1 · Safe-haven inflows 2 · Exporters bleed 3 · SNB intervenes 4 · Supply floods the market 5 · The franc yields
CHF becomes too strong as investors seek a safe haven
SWISS EXPORTS▼
The Swiss franc market: the supply of francs shifts right and the price of the franc falls CHF PRICEQ(CHF) D S S₀ S₁
Source: Swiss National Bank, snb.ch
04 / THE PRICE
PRESENTED BY [MEMBER 4]

The price of intervention

FX RESERVES ▲
CREDIBILITY ▼ 100
expensive
reserves swell
markets resist
speculators attack
credibility erodes
Speculative pressure advancing toward the central bank SPECULATIVE PRESSURE
MARKETS ARE TESTING YOU.
BENEFITS
RISKS
Reduces excessive volatility
Expensive to maintain
Supports exports and growth
Foreign reserves may become too large
Improves market confidence
Markets may overpower intervention
Helps control inflation
Policy credibility may weaken
Framed course verdict on intervention
“Intervention may succeed temporarily — but in the long run, exchange rates are anchored by fundamentals: inflation and growth.”
— FIN4006, LECTURE 4
Then why do it at all? Because stability is worth paying for.
05 / STABILITY
PRESENTED BY [MEMBER 5]

Why stability matters

WITHOUT INTERVENTION WITH INTERVENTION
REDUCED MOTION: BOTH STATES ARE SHOWN WITHOUT MOVEMENT — WITHOUT INTERVENTION THE RATE JITTERS, WITH INTERVENTION IT SETTLES. FLIP THE SWITCH TO COMPARE.
TRADE
INVESTMENT CONFIDENCE
FINANCIAL STABILITY
INFLATION CONTROL
Exchange-rate volatility without intervention, and the calm orderly path once intervention is in place DISORDERLY ORDERLY
Singapore's MAS manages the SGD within the S$NEER policy band to preserve an orderly market.
From disorder to order — this is why intervention exists.
06 / SOURCES & AI USE
PRESENTED BY [MEMBER 5]

Sources & responsible AI use

REFERENCES
  • SNB. (2026). Swiss franc exchange-rate policy. Retrieved from: https://www.snb.ch
  • BIS. (2026). Foreign exchange market statistics. Retrieved from: https://www.bis.org
  • IMF. (2026). Exchange rate arrangements. Retrieved from: https://www.imf.org
  • MAS. (2026). Exchange rate policy framework. Retrieved from: https://www.mas.gov.sg
AI STATEMENT

“AI tools were used responsibly to assist with research, idea generation, and language support. All information was reviewed, verified, and rewritten in our own understanding.”

AI PROMPT SUBMITTED
PURPOSE
VERIFIED?
“Why do governments and central banks intervene in FX markets?”
Page 1 argument structure
Yes — Lecture 4, IMF
“Which tools weaken or strengthen a currency, and how do curves shift?”
Page 2 tools + S₀→S₁ diagram
Yes — lecture convention
“Summarise the SNB's 2011 franc intervention in five clear steps.”
Page 3 case narrative
Yes — checked at snb.ch
“What are the costs and risks of sustained FX intervention?”
Page 4 benefits vs risks
Yes — BIS, Lecture 4
“How does Singapore's MAS use the S$NEER band to keep markets orderly?”
Page 5 closing example
Yes — checked at mas.gov.sg
“Turn this outline into a five-page interactive presentation deck.”
Deck structure & build
Yes — all copy rewritten by us
FIN4006 · TUTORIAL 4 · TOPIC 2 · [MEMBER 1] · [MEMBER 2] · [MEMBER 3] · [MEMBER 4] · [MEMBER 5]
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