A deadly 7.4 magnitude earthquake in April briefly halted production in Taiwan and led to a $92 million loss for TSMC. The Arizona buildings are "well prepared" for earthquakes, Cassidy said.
Other fears surfaced when President-elect Donald Trump expressed opposition to the $52 billion CHIPS Act in October during his campaign. Weeks later, the U.S. Commerce Department finalized TSMC's allotted $6.6 billion from the bipartisan bill.
"Repealing the CHIPS Act would make Americans less safe," Commerce Secretary Gina Raimondo told CNBC in an interview, adding that she doesn't think the incoming administration would repeal it.
"I just don't think they'll do that," Raimondo said.