What number largest bank is the sponsor of the World Rugby Sevens Series?
World Rugby Sevens Series: The World Rugby Sevens Series, known officially as the HSBC World Rugby Sevens Series due to sponsorship from banking group HSBC, is an annual series of international rugby sevens tournaments run by World Rugby featuring national sevens teams. HSBC: HSBC Holdings PLC is a British multinational banking and financial services holding company, tracing its origin to a hong in Hong Kong. HSBC:  It is the world's seventh largest bank by total assets and the largest in Europe with total assets of US$2.374 trillion (as of December 2016).
seventh