Markets — Top Stocks by Market Cap in the US and Korea

What you can see on this page

The market page shows, on one screen, the live prices, day-over-day change, and intraday sparklines of the 10 largest stocks by market cap in seven global markets — the US, Korea, Japan, Germany, France, Spain, and Brazil. Use the market selector at the top to switch instantly between markets, and tap any card to open stock details (key financials and data-driven auto commentary) in a modal.

Quote data may be delayed about 15-20 minutes versus real-time exchange quotes, and after the close it reflects the closing price. A card's change is the percentage versus the prior close, and the sparkline compresses the recent session's price flow.

Largest US stocks by market cap (S&P 500)

Go to each stock's live price, key financials like P/E, P/B, and ROE, and auto commentary page.

Largest Korean KOSPI stocks by market cap

Check live quotes and financial-metric commentary for major Korean large caps.

4 perspectives for reading market flow

Rather than viewing the market page's quotes as mere price changes, applying these four perspectives together lets you interpret the meaning of the day's flow more deeply.

Sector dispersion — Check whether the 10 largest stocks are moving together in one sector or rising and falling in a dispersed way. A day when AI semiconductors and some big tech fall together can be a sector-rotation signal.
Range of movement — A daily ±1-2% is normal, but ±5% or more is often triggered by earnings releases, Fed comments, or macro events. Check the reason on the stock detail page.
Volume — Check volume on the stock detail page. If volume rises while the price stays flat, accumulation or distribution may be underway.
FX impact — When trading US stocks from Korea, KRW/USD moves are reflected directly in realized returns. You need to watch the direction of both the exchange rate and the stock price.

Frequently asked questions

Do I need to sign up to use the service?: Most content — quotes, stock analysis, and learning material — is freely available without signing in. To sync your watchlists, portfolio, and exit strategies across devices, just sign in with a Google account.
Is the quote data real-time?: It may be delayed about 15-20 minutes versus real-time quotes, and after the close it reflects the closing price. Don't use it as an order book for precise execution — use it only to read the flow and for analysis.
Is there a paid plan?: No. Margin Call is a free service funded by advertising, and all features are available equally to all users. There is no premium/free distinction.
Can I fully trust the AI analysis?: No. Given the nature of training data and models, AI output can be factually wrong. Before making investment decisions, always cross-check official financial statements, company disclosures, and brokerage research, and treat this service's analysis as reference only.
How is my personal data protected?: End-to-end HTTPS encryption, per-user data isolation via Supabase Row Level Security, six security headers applied by default, and automatic blocking of bots and abnormal access. See the Privacy Policy for details.

Pages worth viewing together

What you can see on this page

4 perspectives for reading market flow

Rather than viewing the market page's quotes as mere price changes, applying these four perspectives together lets you interpret the meaning of the day's flow more deeply.

Sector dispersion — Check whether the 10 largest stocks are moving together in one sector or rising and falling in a dispersed way. A day when AI semiconductors and some big tech fall together can be a sector-rotation signal.

Range of movement — A daily ±1-2% is normal, but ±5% or more is often triggered by earnings releases, Fed comments, or macro events. Check the reason on the stock detail page.

Volume — Check volume on the stock detail page. If volume rises while the price stays flat, accumulation or distribution may be underway.

FX impact — When trading US stocks from Korea, KRW/USD moves are reflected directly in realized returns. You need to watch the direction of both the exchange rate and the stock price.

Frequently asked questions

Do I need to sign up to use the service?

Most content — quotes, stock analysis, and learning material — is freely available without signing in. To sync your watchlists, portfolio, and exit strategies across devices, just sign in with a Google account.

Is the quote data real-time?

It may be delayed about 15-20 minutes versus real-time quotes, and after the close it reflects the closing price. Don't use it as an order book for precise execution — use it only to read the flow and for analysis.

Is there a paid plan?

No. Margin Call is a free service funded by advertising, and all features are available equally to all users. There is no premium/free distinction.

Can I fully trust the AI analysis?

No. Given the nature of training data and models, AI output can be factually wrong. Before making investment decisions, always cross-check official financial statements, company disclosures, and brokerage research, and treat this service's analysis as reference only.

How is my personal data protected?

End-to-end HTTPS encryption, per-user data isolation via Supabase Row Level Security, six security headers applied by default, and automatic blocking of bots and abnormal access. See the Privacy Policy for details.

Stock Market

🇺🇸 US Top 10

What you can see on this page

Largest US stocks by market cap (S&P 500)

Largest Korean KOSPI stocks by market cap

4 perspectives for reading market flow

Frequently asked questions

Pages worth viewing together

Get the app

Stock Market

🇺🇸 US Top 10

What you can see on this page

Largest US stocks by market cap (S&P 500)

Largest Korean KOSPI stocks by market cap

4 perspectives for reading market flow

Frequently asked questions

Pages worth viewing together

Get the app