Quarterly Review

M&G CREDIT INCOME INVESTMENT TRUST PLC

(the “Company”)

LEI: 549300E9W63X1E5A3N24

Quarterly Review

The Company announces that its quarterly review as at 31 December 2025 is now available, a summary of which is provided below. The full quarterly review is available on the Company’s website at:

https://www.mandg.com/dam/investments/common/gb/en/documents/funds-lit …

Market Review

Global markets ended the year on a constructive note, supported by easing inflation, resilient economic data, and dovish central bank signals. October saw risk
assets buoyed by the US-China trade truce and solid earnings, while UK inflation surprised lower at 3.8%, triggering a gilt rally and reinforcing expectations for further Bank of England rate cuts.
Eurozone inflation held near target, allowing the ECB to maintain its wait-and-see stance. Credit markets reflected a risk-on tone with sterling IG spreads tightening, despite surging US issuance
linked to the AI boom.

November began with volatility as AI bubble concerns and a US government shutdown weighed on sentiment, but mid-month saw a sharp reversal as softer labour data and
dovish Fed commentary drove repricing for a December cut, lifting risk assets. In the UK, the Autumn Budget passed with a fairly muted reaction and failed to turn into the negative risk event many
had feared, as the announcement of larger than expected fiscal headroom reinforced investor confidence.