Tim Olson
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description, tags
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| Exploit differences in dividend taxation across jurisdictions by selling stock cum-dividend and repurchasing ex-dividend (or loaning stock to a domestic investor) to capture tax credits unavailable to foreign holders. |
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Cross-Border Tax Arbitrage
Section: 13.2 | Asset Class: Equities (Cross-Border) | Type: Tax Arbitrage
Overview
The U.S. double-taxes corporate income: once at the corporate level and again when dividends are received by shareholders. Some countries (e.g., Australia, Singapore) use imputation systems that relieve this burden by attaching tax credits to dividend payments. Foreign investors in such markets generally do not receive these tax credits, creating an arbitrage opportunity around dividend dates.
Construction / Mechanics
Under a full dividend imputation system, the tax mechanics per dollar of corporate income P are:
Corporate tax rate = τ_c
Cash dividend paid = D
Dividend tax credit = C = D × τ_c / (1 - τ_c)
Taxable income = I_t = D + C = D / (1 - τ_c) (496)
Personal tax rate = τ_p
Personal income tax = T = I_t × τ_p
Dividend income after credit = I = D + C - T = D × (1 - τ_p) / (1 - τ_c)
When D = P(1 - τ_c) and I = P(1 - τ_p) there is no double-taxation. The price drop from cum-dividend to ex-dividend, in the presence of tax credits, is expected to be D(1 + κ), where κ is the tax credit rate (1 + κ = 1/(1 + τ_c)).
A foreign investor who holds the stock is penalized relative to a domestic investor. Arbitrage strategies:
- Stock sale/repurchase: Foreign investor sells the stock cum-dividend at
S_0and buys it back ex-dividend - Stock loan: Foreign investor loans the stock to a domestic investor cum-dividend and receives the stock back ex-dividend along with a preset portion of the tax credit
Return Profile
Profits are realized around dividend dates. The P&L from either approach approximates the value of the tax credit that the domestic investor can claim. Returns are event-driven and concentrated at dividend announcements.
Key Parameters / Signals
- Tax credit rate
κ: defined by the local corporate tax rate;1 + κ = 1/(1 + τ_c) - Cum-/ex-dividend dates: the arbitrage window is narrow; execution must occur between these dates
- Transaction costs: must be below the value of the tax credit for the strategy to be profitable
- Jurisdiction restrictions: some markets restrict cross-border tax arbitrage; legal/regulatory due diligence required
Variations
13.2.1 Cross-Border Tax Arbitrage with Options
In the absence of a tax credit, there is a theoretical upper bound on American put option value:
V_put(K, T) ≤ V_call(K, T) - S_0 + K + D (497)
With a tax credit, put prices are expected to be higher (reflecting the credit). A foreign investor can:
- Sell the stock cum-dividend at
S_0 - Write a deep ITM put option
Near expiration, the put value is approximately:
V_put(K, T) = K - [S_0 - D(1 + κ)] (498)
The P&L once the put is exercised ex-dividend at strike K:
P&L = S_0 + V_put(K, T) - K = D(1 + κ) (499)
This achieves the same economic result as the stock loan/swap approach, monetizing the full dividend plus tax credit.
Notes
- A swap agreement between foreign and domestic investors can also achieve the same result as the stock loan
- Regulatory risk is significant: many jurisdictions have enacted rules specifically to prevent cross-border dividend tax arbitrage (e.g., anti-avoidance provisions, minimum holding period requirements)
- The options-based variation (13.2.1) requires liquid options markets with deep ITM puts available at reasonable bid-ask spreads
- Legal and tax counsel is essential before implementing; what is permissible varies substantially by jurisdiction pair