sentences:  First Chicago was used as a brand name starting in 1969 and the bank moved into a new skyscraper in the Loop in Chicago (originally called First National Plaza, it is now known as Chase Tower).The bank grew consistently through the early 1970s, however, the bank's growth undermined its underwriting standards.By the end of 1975 and the beginning of 1976, non-performing loans at First Chicago had reached twice the national average for commercial banks at roughly 11% of all loans.