MEXICO CITY, Nov 22 (Reuters) - Mexico's main stock

exchange on Friday reinstated a trading suspension on retailer

Elektra before shares changed hands, with Elektra

warning that any trading would harm its business.

Trading in the retailer, controlled by magnate Ricardo

Salinas, has been suspended on and off for several months after

Elektra said it had been informed by its controlling group

regarding a possible fraud by depositaries of their shares.

The exchange had said earlier on Friday that it would lift

the suspension under order from the nation's banking commission,

but Elektra slammed the decision, saying it had a provisional

court order against such an action.

Elektra said in a statement that if trading were to resume,

it would cause "irreparable damage" to the firm and create

market instability.