📚 Stock Market Glossary
Clear, beginner-friendly explanations, real-world analogies, and visual formulas for key stock market terminology.
Margin Call
Trading & Market💡 Key Takeaway: A broker's demand for an investor to deposit additional money or securities to bring a margin account up to minimum required value.
Pawned Bike Analogy: You borrow $50 to buy a $100 bike with $50 of your own. The bike value drops to $60, so your friend screams 'Pay me $30 cash now or I sell your bike at a pawn shop!'
😎 10-Second Show-off Pro Tip for Friends!
😎 Show-off Tip: Warn your peers: 'When margin calls hit systemic levels, forced liquidations cause market crashes, creating buying opportunities for cash-rich investors!'
📖 Beginner-Friendly Explanation
STEP 1
Core Concept & Meaning
A margin call occurs when the value of an investor's margin account falls below the broker's required minimum maintenance amount.
STEP 2
Why It Matters & Mechanism
If you borrow money from your broker to buy stocks and those stock prices plummet, the broker calls demanding immediate cash top-ups.
STEP 3
Practical Investment Tips & Pitfalls
Failure to meet a margin call forces the broker to liquidate your holdings at market bottom (forced liquidation sale), cascading broader market sell-offs.
📊 Margin call and collateral maintenance ratio warning line
Collateral maintenance ratio = (current stock valuation amount ÷ borrowed debt amount) × 100 < 140%
▶ If the collateral ratio falls below 140%, the securities company automatically sends a margin call
▶ If no deposit is made, a forced sale is made at market price at the opening of the market the next day (counter sell)
⚖️ Key Comparison at a Glance
| Category | Normal transaction (100% of my money) | Credit Leverage (Margin Trading) |
|---|---|---|
| When the stock price plummets -30% | You can wait with only a 30% loss | Margin call sent (additional cash deposit required) |
| When deposit is not paid | You can wait for the stock price to rebound without any incident | Securities companies forced to sell stocks at low prices (counter-selling) |
| Psychological pressure | Low (possible long-term investment) | Extreme (risk of losing the entire principal) |
⚔️ Don't Mix These Up! (Head-to-Head Comparison)
VSROE (Return on Equity)
View ROE→💡 Crucial Difference: ROA assesses asset utilization including liabilities, whereas ROE focuses strictly on equity shareholders' return.
📌 Practical Market & Real-World Example
In 2021, Archegos Capital failed to meet billions in margin calls, prompting global banks to liquidate tens of billions in stocks overnight.