Last updated: August 2026
This page explains the US market data available on NGN Market, how it is refreshed, how key figures are calculated, and the methodology behind the market views across the platform.
It is designed to complement our screeners, stock pages, portfolio tools and other market features, giving you a clear understanding of the data behind the numbers you see.
NGN Market tracks more than 6,000 active US stocks and ADRs, together with more than 5,000 exchange-traded funds (ETFs) across five major US exchanges:
ADRs are included alongside US-domiciled stocks in the stock screener, making it easier to research companies available to US investors through exchange-listed depositary receipts.
ETFs are comprehensively tracked and available through their own ETF screener, with price, change and volume data presented using the same conventions as our stock tables.
We keep ETFs and stocks in separate screeners because their headline size measurements represent different things. A company's market capitalisation measures its equity value, while a fund's assets under management measures the assets held by the fund. Keeping them separate makes rankings and comparisons more meaningful.
Preferred shares, warrants, units and rights are also maintained where available. These security types are separated from the main stock screener and market-wide calculations so those views remain focused on common stocks and ADRs.
NGN Market uses a tiered refresh schedule designed to focus more frequent updates on the securities that matter most to the broader market and to individual users.
Around 500 widely followed US stocks and ADRs are refreshed approximately every 20 minutes during the regular US trading session. This group includes many of the largest and most widely followed companies in the US market, providing frequent coverage across a significant portion of the market by value.
Refresh frequency can also reflect broader demand across the platform.
Actively followed securities may receive more frequent updates, including companies outside the core group.
This means a stock does not need to be one of the largest companies in the market to receive more frequent data.
The broader universe is refreshed on a rotating schedule. Each nightly run updates a portion of company reference data, shares outstanding, quote history and related figures, with wider coverage completed over multiple processing cycles.
This gives NGN Market a simple three-part approach to market coverage: frequent updates for the core market, demand-aware updates for actively followed securities, and rotating coverage across the wider market.
Market views also include date and freshness context so you can identify the trading session represented by the figures on screen.
US quotes displayed on NGN Market are delayed market data. Frequently refreshed securities carry a delay of at least 15 minutes, while the wider market universe follows the refresh schedule described above.
NGN Market's market data is designed for research, screening, portfolio monitoring, comparison and historical reference, rather than real-time trade execution.
Price alerts use the same market data available across the platform, keeping alert calculations consistent with the prices shown in your account.
For a standard single-class listing, market capitalisation is calculated using:
Latest available share price × shares outstanding
Some companies trade through multiple public share classes. Alphabet, for example, trades as GOOGL and GOOG, while Berkshire Hathaway trades as BRK.A and BRK.B.
NGN Market supports both company-level and individual share-class views.
In the default Combined view, companies with multiple share classes are represented once using the company-level market reported company-level market capitalisation. This provides a clearer representation of the company's total equity value and prevents the same company from being counted multiple times in market-level calculations.
You can turn Combined mode off to view each publicly traded share class separately, with the figures associated with that individual listing.
Market data can represent different things depending on the type and structure of the security. NGN Market preserves these distinctions so figures can be interpreted in the right context.
American Depositary Receipts represent ownership in shares of companies listed outside the US. One ADR may correspond to one, several, or a fraction of an ordinary share.
Because ADR structures and reported share counts can differ between companies and data sources, an ADR's calculated market capitalisation may not always correspond directly with the valuation of the company's primary listing.
For detailed valuation work, the company's filings and ADR depositary ratio provide additional context.
ETFs are treated as funds rather than companies throughout NGN Market. This is why they have a dedicated screener and are not included in company market-cap rankings.
Newly tracked ETFs may appear as soon as their listing information becomes available, with additional market data populated through the regular data cycle.
Preferred shares, warrants, units and rights remain searchable where available, while being kept separate from common-stock market totals and rankings.
This allows NGN Market to maintain broad exchange coverage without mixing securities that represent fundamentally different financial instruments.
NGN Market uses the same underlying market data across its stock pages and market tools, while each view selects the universe most appropriate for its purpose.
Market overview features — including market totals, top gainers and losers, the heatmap and the bubble chart — focus on the largest companies by market value.
These companies represent a substantial portion of overall US equity market value, and using a consistent universe makes market-level comparisons more meaningful over time.
Search, the stock screener and the ETF screener provide access to the broader universe of securities we track, including smaller companies, ADRs and ETFs.
This distinction means market overview pages can stay focused on the companies driving a large share of overall market value, while the screeners remain useful for discovering and researching securities across the wider market.
Core figures such as price, percentage change and market capitalisation follow the same calculation conventions across the platform, so their meaning remains consistent from one view to another.
NGN Market is being built as a multi-market research and portfolio platform, with each supported market retaining the characteristics that make its data meaningful.
A few principles shape that approach:
Our goal is not simply to display more market data, but to make data from different markets easier to research, compare and follow from one platform.
NGN Market currently tracks more than 6,000 active US stocks and ADRs, plus more than 5,000 ETFs.
Coverage evolves as securities are listed and delisted and as our market coverage expands.
Around 500 widely followed stocks and ADRs refresh approximately every 20 minutes during regular US trading hours.
Other actively followed securities may also receive more frequent updates based on platform demand.
The broader market universe is refreshed on a rotating schedule over multiple processing cycles.
Refresh frequency reflects market significance, user demand and the type of security being tracked.
The date and freshness information shown across the platform identifies the trading session represented by each figure.
NGN Market currently provides delayed US market data. Frequently refreshed quotes carry a delay of at least 15 minutes, with freshness context shown across relevant market views.
For standard listings, market capitalisation is calculated using the latest available share price multiplied by shares outstanding.
For companies with multiple public share classes, Combined mode uses a company-level market capitalisation so the business can be represented once in company and market-level views. Individual share classes can also be viewed separately.
A company's market capitalisation and an ETF's assets under management measure different things.
Keeping stocks and ETFs in separate screeners makes rankings more meaningful while still giving both security types comprehensive coverage across the platform.
Yes. NGN Market is designed to support holdings across multiple markets within the same portfolio experience while preserving each market's native currency and data conventions.
Market coverage will continue to expand as additional markets are introduced to the platform.
NGN Market provides market information and research tools to help users explore, monitor and understand financial markets.
Market data may be delayed and is provided for informational and research purposes. NGN Market does not execute trades, hold customer funds or provide investment advice. Nothing on the platform constitutes a recommendation to buy or sell a security. Investors should consult appropriate primary sources when making investment decisions.
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