Liquidity

American depositary receipt (ADR)

American depositary receipt (ADR) is a US-traded certificate issued by a depositary bank that represents a specified number of shares in a non-US company.

What it means

An ADR gives US investors a way to trade an interest in a non-US company's shares in US dollars. A depositary bank issues the receipt against underlying shares held by a custodian. The ADR is the tradable instrument; the underlying ordinary shares are a separate instrument, usually traded in the company's home market.

Each ADR has a stated ratio: it might represent one ordinary share, several shares, or a fraction of a share. The ratio is essential when comparing prices or trading volumes. ADRs may trade on a US exchange or over the counter (OTC), and their liquidity can differ substantially from that of the underlying shares.

Although people often use ADR and American depositary share (ADS) interchangeably, an ADS is the interest represented, while an ADR is the certificate evidencing it. Many holdings are recorded electronically rather than through a paper certificate.

How it is calculated

An ADR is not calculated by a single formula, but its share ratio gives a useful indicative price comparison:

Indicative ADR price (US$/ADR) = ordinary-share price (local currency/share) × local shares per ADR × exchange rate (US$/local-currency unit)

  • Ordinary-share price is the quoted price of one underlying share in its trading currency.
  • Local shares per ADR is the program's stated ratio, measured in underlying shares per ADR.
  • Exchange rate is the number of US dollars per one unit of the local currency.

The result is a reference value, not a required ADR trading price. Trading hours, spreads, market demand, depositary fees and the ability to create or cancel ADRs can all affect the observed quote. If the ordinary share is quoted in a currency subunit, convert it to the main currency unit before applying the formula.

Worked example

Assume, hypothetically, that an ordinary share trades at €20, each ADR represents two ordinary shares, and the exchange rate is US$1.10 per €1.

  1. Apply the ratio: €20/share × 2 shares/ADR = €40 per ADR.
  2. Convert currency: €40/ADR × US$1.10/€1 = US$44 per ADR.
  3. For a hypothetical 100-ADR order, the indicative share-equivalent value is US$4,400, representing 200 underlying shares.

Suppose the US market instead shows an ADR bid of US$43.90 and an ask of US$44.10. The quoted bid-ask spread is US$0.20 per ADR, or about 0.45% of the US$44 midpoint. That spread is an immediate execution consideration; it does not establish that an investor can exchange ADRs for underlying shares at the indicative value without costs or restrictions.

Why it matters before you trade

Check the specific ADR ticker, ratio and trading venue rather than assuming that the home-market share's liquidity carries over. Compare the ADR's spread, available trading volume and order size. A large order relative to ADR volume may have a different market impact from a similarly valued order in the ordinary shares.

The ADR is quoted in US dollars, but its value remains exposed to the underlying company and movements in the home-market currency. Different market hours can also leave one venue closed while the other is open. Depositary fees, dividend currency conversion, withholding taxes and the ADR program's terms can affect what a holder receives; terms vary by program and investor circumstances.

How PreTrAIde uses it

PreTrAIde does not specify an ADR-specific model or claim to convert ADRs into underlying shares. For a supported stock in a basket, its pre-trade analysis estimates spread, participation in daily volume, market impact and volatility, and returns a line-level and basket-level verdict with reasoning. Those checks relate to ADR execution only when the submitted instrument and its market data are supported; they do not replace checking the ADR ratio, program terms or home-market currency exposure. PreTrAIde's verdicts are decision support, not trade recommendations.

Common mistakes

  • Treating one ADR as one ordinary share. Confirm the stated ratio before comparing prices, holdings or share counts.
  • Equating US-dollar quotation with no currency risk. Exchange-rate changes can affect the ADR's dollar value.
  • Using home-market volume as ADR volume. Liquidity and spreads belong to the instrument and venue actually traded.
  • Mistaking an indicative conversion for an executable quote. Compare live bids and asks, and account for applicable fees and program terms.

Frequently asked questions

Is an ADR the same as a foreign ordinary share?

No. An ADR represents an interest in a specified number or fraction of underlying ordinary shares, but it is a separate US-traded instrument with its own ticker, trading volume and spread.

How do you compare an ADR price with its home-market share price?

Multiply the ordinary-share price by the number of underlying shares per ADR, then convert to US dollars using an exchange rate with consistent units. The result is indicative, not an executable ADR price.

Does buying an ADR remove foreign-exchange risk?

No. The ADR trades in US dollars, but the value of its underlying shares can still be affected by changes in the home-market currency.

Related terms

Liquidity Liquidity is the ability to buy or sell an asset promptly in the desired quantity without substantially moving its price or incurring excessive trading costs. Bid-ask spread Bid-ask spread is the difference between the lowest displayed price to sell a stock (ask) and the highest displayed price to buy it (bid), measured per share. Average daily volume (ADV) Average daily volume (ADV) is the average number of shares traded per trading day over a specified period, used to gauge a stock’s typical trading activity. Currency risk Currency risk is the possibility that exchange-rate changes alter the value of an investment or its cash flows when measured in the investor’s home currency. Cross-listing Cross-listing is a company's listing of its shares on more than one stock exchange, giving investors access to the stock through multiple trading venues. Pre-trade analysis Pre-trade analysis is the assessment of a proposed stock order or basket before placement, estimating execution costs, liquidity and risk to inform the investor’s decision and execution approach.

Liquidity

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Educational content, not investment advice. PreTrAIde is analysis software, not a broker: it never executes orders, and its verdicts are decision support, not recommendations to buy or sell.