【固收】信用债发行量环比上升，各行业信用利差涨跌互现——信用债周度观察（20251222-20251226）（张旭/秦方好）

Group 1: Primary Market - In the week from December 22 to December 26, 2025, a total of 267 credit bonds were issued, with a total issuance scale of 427.70 billion, representing a week-on-week increase of 15.42% [4] - Among the issued bonds, industrial bonds accounted for 117 issues with a scale of 219.26 billion, a week-on-week increase of 34.26%, making up 51.26% of the total issuance [4] - City investment bonds totaled 110 issues with a scale of 71.36 billion, a week-on-week decrease of 18.87%, representing 16.69% of the total issuance [4] - Financial bonds had 40 issues with a scale of 137.08 billion, a week-on-week increase of 14.92%, accounting for 32.05% of the total issuance [4] - The average issuance term for credit bonds was 2.74 years, with industrial bonds averaging 2.36 years, city investment bonds 3.25 years, and financial bonds 2.35 years [4] - The overall average coupon rate for credit bonds was 2.26%, with industrial bonds at 2.12%, city investment bonds at 2.41%, and financial bonds at 2.23% [4] Group 2: Secondary Market - The total trading volume of credit bonds was 1782.75 billion, reflecting a week-on-week increase of 28.47% [7] - The top three categories by trading volume were commercial bank bonds, corporate bonds, and medium-term notes, with commercial bank bonds at 630.89 billion (up 38.88%), corporate bonds at 521.31 billion (up 15.93%), and medium-term notes at 347.64 billion (up 40.63%) [7] - In terms of credit spreads, the largest increase for AAA-rated industries was in pharmaceuticals, up 5.1 basis points, while the largest decrease was in real estate, down 1.3 basis points [6] - For AA+ rated industries, the largest increase was in household appliances, up 6.4 basis points, and the largest decrease was in textiles and apparel, down 9.8 basis points [6] - The AAA-rated credit spread increased the most in Gansu, up 8.7 basis points, while the largest decrease was in Jilin, down 2.9 basis points [6]