source:[1] Diebold Nixdorf Receives Credit Rating Upgrade from S&P Global Ratings (https://finance.yahoo.com/news/diebold-nixdor ...)[2] Diebold Nixdorf upgraded to 'B+' by S&P on improved cash flow By Investing.com (https://vertexaisearch.cloud.google.com/groun ...)[3] Diebold Nixdorf's Credit Rating Upgrade: A Strategic Turnaround and Path to Long-Term Creditworthiness - AInvest (https://vertexaisearch.cloud.google.com/groun ...)