Let's analyze each option step by step to determine which surprise would most likely **decrease** the valuation of a currency. ### 1. **Surprise decrease in CPI (Consumer Price Index)** - **CPI** measures **inflation** at the consumer level. - A **decrease** in CPI means **lower inflation** than expected. - **Central banks** often respond to lower inflation by **keeping rates lower** or even **cutting rates** to stimulate the economy. - **Lower interest rates** make the currency less attractive to investors, as they receive lower returns for holding assets in that currency. - **Result:** This would likely **decrease the valuation** of the currency. ### 2. **Surprise increase in central bank rates** - A **rate increase** by the central bank is usually a response to higher inflation or a desire to strengthen the currency. - **Higher rates** attract foreign capital, as investors get better returns. - **Result:** This would likely **increase the valuation** of the currency (not decrease it). ### 3. **Surprise increase in PPI (Producer Price Index)** - **PPI** measures inflation at the production level (costs for producers). - An **increase** in PPI signals **rising inflation**. - This may prompt the central bank to **raise interest rates** to control inflation. - Higher future rates often mean a **stronger currency**. - **Result:** This would likely **increase the valuation** of the currency (not decrease it). --- ## **Final Answer:** ### **A surprise decrease in CPI would most likely decrease the valuation of a currency.** --- ### **Summary Table** | Option | Likely Currency Effect | Reason | |--------------------------------------|-----------------------|------------------------------------------------------------------------| | Surprise decrease in CPI | Decrease | Signals lower inflation, likely leading to lower rates and weaker FX. | | Surprise increase in central bank rates | Increase | Higher rates attract capital, strengthening the currency. | | Surprise increase in PPI | Increase | Signals higher inflation, may prompt rate hikes, strengthening FX. | --- ### **Why other options are not correct:** - **Surprise increase in central bank rates** and **surprise increase in PPI** both point to higher inflation/interest rates, which typically **strengthen** a currency, not weaken it. Only a **surprise decrease in CPI** suggests a scenario where the central bank might lower rates, making the currency less attractive and thus **decreasing its valuation**.