MarcumAsia Co-Chair Drew Bernstein, left, attended the Asia Go IPO Summit in Hong Kong last week.Marcum Asia Though the Nasdaq is headquartered New York and many of its best-known companies such as Nvidia and Microsoft are based in the U.S., overseas listings by Asian companies account for about half of its IPOs these days. Tougher listing rules proposed by the Nasdaq this month for smaller companies – particularly from China -- would improve protection for investors yet have a “dramatic” impact leads busi ...