RE:why the pull-back in BIPC ? At the height of the bidding war with PPL the BIPC shares were trading at an unusually high premium to BIP shares of ~40%. As the IPL deal progressed the premium narrowed to ~20% in early July. The premium to BIP is now ~10% might be justified by the tax advantage of the corporate share versus LP relationship of BIPC and BIP.
Perhaps the BIPC/BIP premium during the bidding war was artificial, it likely influenced some decisions in the tender process.