Warren says she will "work with labor leaders, policy experts, fund counsel, actuaries, and benefits specialists" to create policy to help financially challenged pension plans.

It could signal liquidity risk to the broader economy.

Avoiding the typical IPO process would "fit in nicely with the Airbnb startup narrative and culture."

M&A, real estate purchases, and corporate investments could all be affected by proposed new regulations for expanded review by the Committee on Foreign Investment in the U.S.