...+ We are assigning our '###+/A-2' long- and short-term issuer credit ratings to UBS Group AG, the newly formed nonoperating holding company (NOHC) of the UBS group. + The ratings are based on our view of UBS' creditworthiness as a leading global banking group, constrained by the structural subordination of NOHCs' creditors and our doubts that UBS Group AG would benefit from extraordinary support from the Swiss government, even if this were received by the operating subsidiaries. + The stable outlook reflects our expectation that management will maintain UBS' balance sheet strength, continue to improve the group's profitability, and further reduce potential sources of significant earnings volatility. LONDON (Standard & Poor's) Feb. 12, 2015--Standard & Poor's Ratings Services said today that it assigned its '###+/A-2' long- and short-term issuer credit ratings to Switzerland-based holding company UBS Group AG. The outlook is stable. Since late 2014, UBS Group AG has been the ultimate holding...