ChipMOS Technologies is trading 4.5% higher in pre-market at $70.81 on September 30, rebounding after the prior session’s 5.34% decline; no verified cause was identified. - It closed September 29 at $67.76. - August earnings and profit growth were reported September 29; coverage said shares fell after the report, but available information does not establish it as the cause of the pre-market rise. - No verified late-breaking company announcement explaining the rebound was identified.