By BENOÎT FAUCON
The rial has shed about 25% of its value against the dollar this month amid mounting sanctions aimed at halting Iran’s nuclear program. The sudden decline in the rial last week, the latest leg in a yearlong decline, prompted Tehran’s first major riots in two years and a crackdown on informal money changers. The situation appeared to have stabilized Saturday as Tehran’s bazaar—a key indicator of Iran’s business climate—reopened after closing for the second half of last week. But in an indication the turmoil may not be over, many money changers refused to trade Sunday, either out of fear of arrest or because of a refusal to comply with a government order imposing a fixed dollar rate……