Magnite Inc. shares were down 14% to $9.17 after the company said it has signed with NewsGuard, an organization that rates news sources for credibility and transparency, as part of its ongoing commitment to brand safety and inventory quality. The company said NewsGuard will enable Magnite to better assess the credibility of news-oriented inventory and help prevent the monetization of misinformation and disinformation on Magnite's platforms. Magnite will have access to NewsGuard's detailed trust ratings for thousands of news and information sources developed by a team of trained...…Magnite Inc. shares were down 14% to $9.17 after the company said it has signed with NewsGuard, an organization that rates news sources for credibility and transparency, as part of its ongoing commitment to brand safety and inventory quality. The company said NewsGuard will enable Magnite to better assess the credibility of news-oriented inventory and help prevent the monetization of misinformation and disinformation on Magnite's platforms. Magnite will have access to NewsGuard's detailed trust ratings for thousands of news and information sources developed by a team of trained...WW…