Key Apple partner who is toggling production of iPhones between China and India have suspended their shares.

Hon Hai Precision Industry Co.’s shares were suspended from trading overnight ahead of what is tipped to be a major announcement/

The move which is normally associated with the release of sensitive information has caught the market by surprise.

The world’s largest assembler of Apple’s iPhones will apply for a resumption of trading after that disclosure, Taiwan’s stock exchange said in a statement.

A Hon Hai representative did not have immediate comment to provide. Trading suspensions typically take place ahead of the announcement of potentially market-moving decisions, such as an acquisition.