...January 20, 2020 - Nationwide Building Society has steadily increased its loss-absorbing capacity, principally through senior nonpreferred debt issuance. - However, Nationwide's financial performance is currently under pressure from sustained price competition in the U.K. mortgage market and its technology investment program. - We are therefore affirming our 'A/A-1' long- and short-term issuer credit ratings (ICRs) on Nationwide, our 'A+/A-1' resolution counterparty ratings, and all our issue ratings on Nationwide's debt instruments. - The positive outlook indicates that we could raise the long-term ICR if we become more comfortable that Nationwide's net interest margin, cost efficiency, and pretax earnings will exhibit greater stability. LONDON (S&P Global Ratings) Jan. 20, 2020--S&P Global Ratings today affirmed its 'A/A-1' long- and short-term issuer credit ratings (ICRs) on U.K.-based Nationwide Building Society. The outlook is positive. At the same time, we affirmed our 'A+/A-1' long-...