Shares of the country's two telecoms operators are expected to decline when they resume trading today, said fund managers.
Etisalat, the first operator in the Emirates, will be required to pay a fee of 15 per cent on its revenues and 35 per cent on profits from this year to 2016.
Du, which launched its operations only in 2007, will be required to pay 17.5 per cent on profits this year and 5 per cent on revenues.
"The shares will probably go down for du, despite the fact that the company has taken provisions in previous years in expectation, ahead, of the royalty fee which will absorb some of the hit," said Wadah Al Taha, the chief investment officer at Al Zarooni Group, an investment company in Dubai.
"For Etisalat, the combination of taking from profit and revenues will cause some confusion for retail investors.
"I think the decision will cause a shift in strategy for both companies, who will try to offer services that are not listed by the regulator, that are exempted from the royalty fees."
Etisalat's shares have advanced 9 per cent so far this year, trading at Dh9.96, while du's shares have surged 34.2 per cent, trading at Dh3.88 each.