Which of the following is NOT a component of Other Comprehensive Income (OCI)?

Changes in retained earnings are not considered a component of Other Comprehensive Income (OCI). OCI includes items that are not recognized in the net income but still affect equity. The key components of OCI are usually defined by accounting standards such as unrealized gains and losses on certain types of investments, foreign currency translation adjustments, and the effective portions of cash flow hedges.

Unrealized gains and losses on foreign investments, foreign currency translation adjustments, and the effective portions of cash flow hedges are all forms of income or losses that arise from activities outside regular revenue-generating operations. These items can be particularly important for stakeholders in understanding the overall financial health of a company, as they can significantly affect equity without impacting the net income directly.

In contrast, retained earnings represent the cumulative amount of net income that has been retained (not distributed as dividends) by the company. Changes in retained earnings are reflected in the income statement and, therefore, measure the company's profitability over time rather than be classified as OCI. Thus, retained earnings are not reported as part of OCI, making the choice regarding changes in retained earnings the accurate answer in identifying what does not belong as a component of OCI.