[rob74]

Why should the US nationalize these fabs? I mean, regardless of whether China invades Taiwan or not, the fabs located in the US are owned by TSMC, and TSMC is owned by TSMC's shareholders, which will likely remain the same regardless of whether the state of Taiwan still exists...

[dirtyid]

The same reason west confiscated Russian reserves, and destroyed historic economic linkages via sanctions. You can't "regardless" of invasion when invasion/not invasion are qualifiably different geopolitical realities. Most analysis suggest at minimum there will be heavy PRC sanctions in event of invasion, a successful one would make TSMC a PRC controlled company, which which will not be business as usual for TSMC operations or share holders.