https://www.reuters.com/article/usa-trump-socialmedia/trumps-new-social-media-deal-sparks-400-surge-in-spacs-shares-idUSKBN2HB1UF >(Reuters) -Former U.S. President Donald Trump's plan to create a social media app after Twitter Inc and Facebook Inc barred him won an endorsement from investors on Thursday who sent shares in a shell company backing the effort soaring.