DETROIT – The Nasdaq stock exchange is seeking U.S. authority to require more diversity in the boardrooms of Nasdaq-listed companies, or for those companies to explain why they can not. The proposal filed with the U.S. Securities and Exchange Commission on Tuesday, if approved, would require all companies listed on the exchange to publicly disclose consistent, transparent diversity statistics about their board of directors. It would require most Nasdaq-listed companies to have, or explain why they don’t have, at least two diverse directors. This includes having one board member who self-identifies as female and one who self-identifies as either an underrepresented minority or LGBTQ. Foreign companies and smaller reporting companies would have additional flexibility.