📚 Stock Market Glossary
Clear, beginner-friendly explanations, real-world analogies, and visual formulas for key stock market terminology.
Dollar Index (DXY)
Macro & Policy💡 Key Takeaway: An index measuring the value of the U.S. dollar relative to a basket of six major foreign currencies.
Tug-of-War Analogy: DXY is a tug-of-war match between the US Dollar and 6 rival currencies. When the Dollar pulls hard (DXY goes up), cash leaves emerging market stock markets to join the winning Dollar!
😎 10-Second Show-off Pro Tip for Friends!
😎 Show-off Tip: Say, 'When DXY breaks above 105, foreign institutional investors dump emerging equities to protect against currency depreciation loss!'
📖 Beginner-Friendly Explanation
STEP 1
Core Concept & Meaning
The U.S. Dollar Index (DXY) measures the strength of the U.S. dollar against a basket of six major currencies: EUR, JPY, GBP, CAD, SEK, and CHF, weighted heavily toward the Euro (57.6%).
Base value starts at 100.
STEP 2
Why It Matters & Mechanism
00.
• Rising DXY (>105): Strong Dollar ('King Dollar'). Global capital flees to safe-haven U.S. cash, sucking liquidity out of emerging stock markets like Korea's KOSPI.
- Falling DXY (<98): Weak Dollar. Capital flows into global equities, commodities, and emerging market assets, triggering global market rallies.
STEP 3
Practical Investment Tips & Pitfalls
Monitoring DXY helps investors anticipate foreign net flows and currency movements.
📊 Dollar Index (DXY) Component Currency Weights
DXY = Euro (57.6%) + Yen (13.6%) + Pound (11.9%) + Canadian Dollar (9.1%) + Krona (4.2%) + Franc (3.6%)
▶ The absolute proportion of the euro (EUR) is about 58% ➔ When the euro weakens, the dollar index automatically rises
⚖️ Key Comparison at a Glance
| Category | Dollar index rises (strong dollar) | Dollar index falls (about USD) |
|---|---|---|
| Global Psychology | Preference for safe assets (rising interest rates / geopolitical risks) | Preference for risky assets (expectation of economic recovery/interest rate cut) |
| Foreigners supply and demand in Korean stock market | Net selling (concerns about foreign exchange loss due to falling Korean won) | Net purchase (expectation of won appreciation and profits) |
| Commodities/Gold Price | Downward pressure (burden of dollar-denominated raw material prices) | Good news (increased purchasing power of raw materials) |
| Impact on export companies | Increase in export foreign exchange gains (improvement in short-term operating profit) | Decrease in export exchange gains (change in price competitiveness) |
📌 Practical Market & Real-World Example
As Fed rate cut delays pushed DXY up toward 106, foreign outflows triggered currency pressure on emerging Asian stock markets.