UBS Group AG has filed an application for a national bank charter for its US franchise as it seeks to expand in the region. A national bank charter will help UBS Bank USA to expand offerings for wealth management clients to include "bank-provided payments, checking and savings account services," according to a memo seen by Bloomberg News that was confirmed by a spokesperson.  "Our US clients hold significant deposits and largely rely on other banks for their everyday banking needs," Americas boss Rob Karof ...