Weekly stock screens
Market Radar
Separate stock screens from chart indicators and review market breadth, weekly breakouts, one-year winners, and market-cap concentration.
2026-05-15
Market breadth
KOSPI 25%
KOSPI 25% / KOSDAQ 11.5%
2026-05-15
52-week highs + turnover
한국쉘석유
20 names
2026-05-15
One-year return breakouts
대한광통신 3,834.8%
KOSPI 미래산업 / KOSDAQ 대한광통신
2026-05-15
KOSPI heavyweight concentration
60.1%
3,686.8T KRW
2026-05-15
Trading value spikes
동양고속
20 names
2026-05-15
Foreign + institution co-buy
하나마이크론
20 names
2026-05-16
US market breadth
NYSE 22.7%
NYSE 22.7% / NASDAQ 23.4% / AMEX 11.1%
2026-05-16
US 52-week highs + turnover
J.B. Hunt Transport Services, Inc.
11 names
2026-05-16
US mega-cap concentration
25.54%
28.7T USD
daily
US mega-cap concentration
Tracks the market-cap weight of the 10 largest US-listed mega-cap stocks.
2026-05-16
Top 10
25.54%
KOSPI market cap share
KOSPI market cap share
Heavyweight concentration
| Rank | Name | Market | Mkt Cap | Weight |
|---|---|---|---|---|
| 1 | Top 10 US Mega-Caps - | US | 28.7T USD | 25.54% |
| 2 | NVIDIA Corporation NVDA | NASDAQ | 5.5T USD | 4.87% |
| 3 | Alphabet Inc. GOOGL | NASDAQ | 4.8T USD | 4.26% |
| 4 | Apple Inc. AAPL | NASDAQ | 4.4T USD | 3.92% |
| 5 | Microsoft Corporation MSFT | NASDAQ | 3.1T USD | 2.79% |
| 6 | Amazon.com, Inc. AMZN | NASDAQ | 2.8T USD | 2.53% |
| 7 | Broadcom Inc. AVGO | NASDAQ | 2T USD | 1.79% |
| 8 | Taiwan Semiconductor Manufacturing Company Ltd. TSM | NYSE | 1.9T USD | 1.66% |
| 9 | Tesla, Inc. TSLA | NASDAQ | 1.6T USD | 1.41% |
| 10 | Meta Platforms, Inc. META | NASDAQ | 1.6T USD | 1.39% |
| 11 | Walmart Inc. WMT | NASDAQ | 1T USD | 0.93% |
Interpretation guide
How to read U.S. mega-cap concentration
The U.S. Mega-Cap Concentration radar shows how much of the U.S. large-cap universe is controlled by the 10 largest companies. It is especially important when AI, semiconductor, and platform companies dominate index performance.
Measurement rules
The radar groups TradingView U.S. large-cap data by issuer and calculates the top-10 companies' combined market-cap weight. Companies with multiple share classes, such as Alphabet, are treated as one issuer to avoid double counting.
- Top 10 US Mega-Caps is the combined market-cap weight of the 10 largest companies.
- Multiple share classes such as GOOG and GOOGL are grouped into one Alphabet issuer.
- Each company weight is its share of the screened U.S. large-cap universe.
How to interpret it
Rising concentration means U.S. indexes depend more heavily on a small group of mega-cap earnings and valuations. High concentration with weak breadth often means the index is strong while the average stock is not.
- A rising top-10 weight signals mega-cap leadership.
- Rising concentration with weak Nasdaq breadth is a narrow rally.
- Falling concentration with improving breadth is a healthier rotation setup.
How to respond
When mega-cap concentration is high, index ETFs can look healthy even while individual opportunities narrow. Earnings events from AI and semiconductor leaders can also move global risk appetite.
- Separate index exposure risk from single-stock opportunity risk.
- If mega-caps start correcting, check spillover risk to Nasdaq and Korean growth stocks.
- If concentration eases while new highs broaden, expand the small- and mid-cap growth watchlist.
Related views
Related indicators and radar
S&P 500
The broad large-cap benchmark for U.S. equity conditions.
Links mega-cap concentration to the S&P 500 benchmark.
NASDAQ Composite
A global gauge for growth-stock and technology risk appetite.
Connects mega-cap concentration to the NASDAQ growth complex.
US market breadth
U.S. advance-decline breadth, high-low balance, and participation.
Checks whether mega-cap strength is masking weak breadth.
US 52-week highs + turnover
U.S. large caps at or near 52-week highs, sorted by turnover.
Tests whether concentration is accompanied by new-high expansion.