Is the iShares MSCI USA Islamic UCITS ETF's Dollar Line (ISDU) Halal? Two Tickers, One Fund, a Two Point Return Gap That Is Pure Currency, and the Sarf Rule That Governs the Conversion: A Sharia Analysis for Muslim Investors (2026)

Author: Zaid Alissa, CTO and Halal Finance Researcher | Published: September 2026 | Updated: September 2026

A British Muslim looking at the iShares MSCI USA Islamic UCITS ETF on the London Stock Exchange finds two tickers. ISUS is quoted in pence. ISDU is quoted in US dollars. They have the same ISIN, IE00B296QM64, the same 145 holdings, the same 0.30 percent fee, the same 7 December 2007 inception, the same 0.48 trailing dividend, the same 0.63 percent yield and the same 21 May 2026 ex dividend date.

They are one fund. And yet over the year to 3 September 2026 the dollar line returned 37.12 percent and the sterling line returned 35.12 percent. Two percentage points, same holdings, same fee.

That gap is the subject of this article, along with the fiqh question it raises, which is not about the fund at all. Post 71 analyses the screen, the holdings and the concentration. This one is about the conversion.

A UCITS fund can list the same share class on several exchanges and, on one exchange, in several currencies. Each of those quotations is a trading line. The line changes the currency in which your order settles. It does not change the fund, the share class, the net asset value, the holdings, the fee or your entitlement.

The evidence sits side by side on the two pages:

Figures from stockanalysis.com for LON:ISUS and LON:ISDU on 3 September 2026. The two pages report assets of 413.93 million and 412.05 million dollars respectively, a difference of 413.93 minus 412.05, which is 1.88 million, or 1.88 divided by 413.93, that is 0.45 percent. That is a snapshot difference in a data feed, not two pools of money.

The sterling line closed at 7,705.00 pence, which is 7,705.00 divided by 100, or 77.05 pounds. The dollar line closed at 104.02 dollars. Divide: 104.02 divided by 77.05 is 1.3500 dollars per pound.

Check it back the other way. 77.05 times 1.3500 is 104.0175, against a reported 104.02. The two prices are the same net asset value expressed at the prevailing exchange rate, to within the rounding of a published close.

The dollar line returned 37.12 percent over the year. The sterling line returned 35.12 percent. The difference is 37.12 minus 35.12, which is 2.00 percentage points, on identical holdings.

Write S for the number of dollars per pound. A sterling investor's return is the dollar return adjusted by the movement in S:

One plus 0.3512 equals one plus 0.3712, multiplied by S at the start divided by S at the end.

So S at the start divided by S at the end is 1.3512 divided by 1.3712, which is 0.98541. Inverting, S at the end divided by S at the start is 1 divided by 0.98541, which is 1.0148. Sterling appreciated 1.48 percent against the dollar over the year.

Check it back: 1.3712 divided by 1.014803 is 1.35120, which is a sterling return of 35.12 percent, exactly the published figure.

Now the point that this whole article exists to make. The sterling line did not protect the sterling investor from anything. He earned two percentage points less than the dollar line, on the same American companies, because the fund's assets are dollar assets and its value is a dollar value regardless of which ticker you type. Buying the pence quoted line is a settlement convenience. It is not a hedge, and anyone who has been told otherwise has been told wrong.

Allah says in Surah An-Nisa, verse 29:

يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَأْكُلُوا أَمْوَالَكُم بَيْنَكُم بِالْبَاطِلِ إِلَّا أَن تَكُونَ تِجَارَةً عَن تَرَاضٍ مِّنكُمْ

"O you who have believed, do not consume one another's wealth unjustly but only [in lawful] business by mutual consent." (Saheeh International)

Here is where the two lines genuinely differ in fiqh, and it has nothing to do with the fund.

Buy ISUS from a sterling account and no currency exchange happens at the point of trade. You pay pounds and receive shares.

Buy ISDU from a sterling account and your broker converts pounds into dollars first. That conversion is sarf, the exchange of one currency for another, and it is governed by its own rules.

The classical text is the hadith of Ubadah ibn al-Samit: "Gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates, and salt for salt, like for like, equal for equal, hand to hand. If these classes differ, sell as you wish if it is hand to hand." (Sahih Muslim 1587). Pounds and dollars are different classes, so the equality requirement does not apply and any agreed rate is permissible. The hand to hand requirement does apply, and it is not negotiable.

AAOIFI treats this in Shari'ah Standard No. 1, Trading in Currencies. That text is not published free, but two things can be established from documents that are. AAOIFI's own standards listing confirms the standard's number and subject. And Shari'ah Standard No. 57 on gold, whose full English text is public, states in its scope that it "does not cover the Shari'ah rulings for currencies, as they are covered in a separate standard", and cross refers to "item (2/6) of Shari'ah Standard No. (1), on 'Trading in Currencies'" for the manner in which counter-values must be exchanged.

Standard No. 57 also states the principle that decides the deferred case, in clause 3/2/3: "It is not permissible to stipulate deferment of both the counter-values when selling gold, as in the case of forward or futures contracts. This is because in these cases, the Shari'ah requirement of exchange of the counter-values is not met."

That sentence is about gold, and gold and currency are governed by the same family of rules because both are ribawi. It tells you exactly what a forward currency contract fails to do.

Some funds offer a currency hedged share class. It removes the exchange rate exposure by holding forward foreign exchange contracts, rolled continuously.

That is the contract Standard No. 57's clause 3/2/3 describes as failing the exchange requirement, and it is named directly in the index world too. The Yasaar Shariah Supervisory Board Opinion for the FTSE Yasaar Global Equity Shariah Index Series, dated 3 February 2025, lists "forward currency transactions" among the core activities that disqualify a company, and separately excludes "derivatives, including futures, options and contracts for differences".

This fund has no hedged class. justETF records its currency risk as unhedged. For a Muslim investor that absence is not a gap in the product range. It is the reason the product is usable.

The practical consequence is worth stating without softening it. A Muslim who holds American equities carries dollar exposure and, on the mainstream reading of the sarf rules, cannot remove it with a forward. He can reduce it only by holding fewer American assets, which is an allocation decision rather than a hedging one. Our portfolio design article covers how to make it, and gold versus cash covers the other classical response to currency risk.

AAOIFI Shari'ah Standard No. 31 on Controls on Gharar in Financial Transactions asks whether the object of the contract is adequately knowable. On a trading line the answer is straightforward: the ISIN, the holdings, the fee and the net asset value are all published and identical across lines. There is no hidden object.

The one thing the published data does not explain is a discrepancy worth reporting rather than smoothing over. The two pages give different betas for the same fund, 0.31 for the sterling line and 0.74 for the dollar line. Neither page states the benchmark against which it is measured, so the difference cannot be explained from the data available. It is reported here as a caution about taking a single risk statistic from a data feed at face value, which is the same caution that applies to any single field on any screener.

On maysir there is nothing in the structure. Buying a share class in a different settlement currency is not a wager. The speculative use of currency lines, buying and selling the pair to try to capture a rate move, would be, and Ferri's warning that the ease of intraday dealing "may cause some investors to trade too much" (The ETF Book, 2008, p. 101) applies with particular force where two tickers invite the comparison.

Spreads. Ferri's rule is that "Trading spreads of ETFs reflect a compilation of the trading spreads in the underlying securities" (p. 68), and that spreads on foreign holdings widen when the home market is closed (pp. 67 to 68). Both lines hold American shares, so both are at their tightest while New York is open, which for a London investor is the afternoon.

Conversion cost. Ferri's arithmetic on small trades is that a commission of 8 dollars on a 1,000 dollar purchase is 8 divided by 1,000, that is 0.8 percent, before you own anything (pp. 97 to 98). A broker's currency conversion charge behaves the same way but is levied on the entire amount converted. To size it, assume a charge of 0.50 percent, stated here as an illustration rather than as any broker's actual tariff. On 10,000 pounds converted that is 10,000 times 0.0050, or 50 pounds. The fund's annual management fee on the same 10,000 pounds is 10,000 times 0.0030, or 30 pounds. So a single conversion at that assumed rate costs 50 divided by 30, which is 1.67 times a full year of the fund's fee.

That is the practical answer to the question of which line to buy. If you hold pounds and your broker charges to convert them, the sterling line saves you a real cost and gives up nothing, because the currency exposure is identical either way. If you already hold dollars, the dollar line saves you the same cost in the other direction. Our earlier piece on halal ETF liquidity covers how to read the spread before you deal, and the stock screener and crypto screener apply the same discipline to the individual holdings and to any digital asset sleeve.

Settlement timing in a currency exchange. The hand to hand requirement is agreed. What counts as hand to hand in a market that settles on a standard cycle is not. One position holds that constructive possession at the moment of contract, evidenced by an irrevocable same day transfer, satisfies it, and points to Standard No. 57's acceptance of a certificate issued on trade date as the strictest published analogue. Another holds that standard market settlement is a deferment of both counter-values and therefore fails, which would make ordinary broker conversions problematic. The first position is the one most contemporary Islamic financial institutions operate on. The second is held and is not unreasonable. This article maps them and does not choose.

Whether a hedged class could ever be structured permissibly. The mainstream answer is no, because a forward defers both counter-values. A minority view explores whether a unilateral promise structure, rather than a bilateral forward, could achieve part of the effect. Nothing in the products covered by this series uses such a structure, so the question is theoretical here, and the practical position stands: the unhedged class is the one a Muslim can hold.

Do not buy the sterling line expecting a hedge. It is not one. The two point return gap over the last year proves it with the provider's own published figures.

Choose the line that matches the currency you already hold. That is the only difference that costs money.

Check what your broker charges to convert, and compare it with a year of the fund's fee before you decide the choice is trivial. On the illustration above a single conversion cost 1.67 times the annual management charge.

Avoid currency hedged share classes of any fund unless you have a specific ruling permitting the forward contracts they use. This fund does not offer one, which removes the question.

Do not trade the pair. Two tickers on one fund is an invitation to churn, and churn is a cost with no offsetting benefit.

ISDU and ISUS are one fund with two prices. Everything a Muslim needs to assess about the underlying, the screen, the concentration and the purification duty belongs to the fund, not to the line.

What belongs to the line is smaller and still worth knowing. The choice does not change your currency exposure by a penny, and the last year's figures show a two percentage point difference in reported return that is entirely the movement of sterling against the dollar. The choice does change whether you make a currency exchange, and a currency exchange is sarf, governed by a rule about immediacy that is agreed in principle and argued about in application. And the choice would matter a great deal if a hedged class existed, because the forward contracts that make a hedge work are the ones the sources cited here treat as failing the exchange requirement outright.

This article is educational and is not a fatwa. Consult a qualified scholar for a ruling on your own circumstances.

No. Both are London trading lines of the same share class of the iShares MSCI USA Islamic UCITS ETF, ISIN IE00B296QM64. They report the same inception date, the same 0.30 percent fee, the same 145 holdings, the same 0.48 trailing dividend, the same 0.63 percent yield and the same 21 May 2026 ex dividend date. Only the quote currency and therefore the price differ.

No, and this is the most common misunderstanding about trading lines. The fund holds American shares valued in dollars. Over the year to 3 September 2026 the dollar line returned 37.12 percent and the sterling line 35.12 percent, a gap of 2.00 percentage points that is entirely the 1.48 percent appreciation of sterling against the dollar. The line changes the settlement currency, not the exposure.

The one that matches the currency in your account, because the only real difference is the cost of converting. If you hold pounds, the pence quoted line avoids a conversion charge; if you hold dollars, the dollar line does. On an assumed 0.50 percent conversion charge, converting 10,000 pounds costs 50 pounds, which is 1.67 times the fund's 30 pound annual fee on the same amount.

Currency exchange between different currencies is permissible at any agreed rate, on the hadith of Ubadah ibn al-Samit, provided it is hand to hand. Whether a conversion that settles on the market's standard cycle satisfies that requirement is a genuine disagreement. The position most Islamic financial institutions operate on is that an irrevocable same day exchange satisfies it; a stricter position holds otherwise.

A hedged class uses rolling forward foreign exchange contracts. AAOIFI Shari'ah Standard No. 57 states, in the gold context that shares the same ribawi rules, that deferring both counter-values as in a forward or futures contract means "the Shari'ah requirement of exchange of the counter-values is not met", and the Yasaar Shariah Supervisory Board Opinion of 3 February 2025 names forward currency transactions among excluded activities. This fund offers no hedged class, and justETF records it as currency unhedged.

They do: 0.31 for the sterling line and 0.74 for the dollar line. Neither page states the benchmark used, so the difference cannot be explained from the published data. It is reported here rather than glossed over, as a reminder that a single risk figure from a data feed should not be trusted without knowing what it was measured against.

Compare the ISIN first; it is the definitive identifier and here it is IE00B296QM64 on both. Then check that the fee, inception date, holdings count and dividend history match. If those agree and only the price differs, you are looking at one fund in two currencies.