Three Things to Check When Comparing ADR Prices with Underlying Shares
Align share ratios, exchange rates, and trading times when comparing ADRs with underlying shares. Check EPS conversions and depositary fees before treating price differences as risk-free arbitrage.
An ADR is an American Depositary Receipt issued against a foreign company’s underlying shares, and the number of shares represented by one ADR varies by company. To compare prices, apply that ratio and the exchange rate, and align different trading times. Dollar trading does not eliminate the company’s local-currency risk.
First check how many underlying shares one ADR represents
The SEC’s ADR guide explains that one receipt can represent one underlying share, multiple shares, or a fraction of a share. Check the ratio in the deposit agreement and company filings, and record the effective date if a stock split or program change occurred. Converting only the share price while using EPS per underlying share distorts the P/E ratio (PER). Also check whether the ADR represents a different class from ordinary shares. Even when two tickers belong to a company with the same name, do not compare prices alone without confirming that shareholder rights and underlying shares are identical.
Different trading hours can look like a discount
If new information is reflected in US trading after the local market has closed, the ADR price can differ from the underlying shares’ last closing price. Treating this gap as immediately available arbitrage overlooks trading hours and the freshness of prices. Record whether the exchange rate is from the underlying shares’ close or the current ADR trading time. Conversion into underlying shares may require depositary and broker procedures, fees, and processing time. Different market holidays and settlement terms leave price risk while the offsetting trades are actually completed.
Distinguish dollar denomination from dollar business exposure
ADRs trade in dollars, but the underlying company may earn revenue and incur costs in multiple currencies. When a dividend declared in local currency is converted, the exchange rate and depositary-related costs can make the actual dollar receipt differ from expectations. The currency and disclosure risks of international investing described by Investor.gov still require attention. Check the program’s disclosure framework and trading venue, and consult the agreement for depositary fees, corporate-action notices, and voting procedures. Do not generalize one company’s terms to every ADR.
Worked example
Hypothetical example: Assume one underlying share costs 600 local currency units, $1 equals 30 local currency units, and one ADR represents 2 underlying shares. The simple equivalent price at the same time is 600 × 2 ÷ 30 = $40. If EPS per underlying share is 30 local currency units, translated EPS per ADR is 30 × 2 ÷ 30 = $2, giving a simple P/E ratio (PER) of 20 times. Even if the ADR trades at $42, the 5% gap is not a locked-in arbitrage profit; check timing differences, conversion costs, and contractual restrictions.
What to check
- Have you confirmed the underlying shares per ADR and the effective date in company disclosures?
- Have you converted both price and EPS to the same security unit?
- Have you recorded the observation times for the underlying shares, ADR, and exchange rate?
- Have you read depositary costs and conversion and dividend terms?
Sources and primary materials
This is educational material about research methods. For an actual company decision, verify the filings and primary sources for the relevant period.