You may be able to use 2026 materials for overlapping concepts, but you should not rely on them blindly. The safest approach is to use 2027-aligned study materials for final preparation, especially for the areas with visible restructuring.
Use updated 2027 material for Quantitative Methods because reading titles and content flow have changed.
Use updated 2027 material for Equities because the area has been significantly reorganized.
Use updated 2027 material for Ethics because Standards guidance is split into separate readings and GIPS is not shown separately in the 2027 Level I outline.
For Economics, FSA, Fixed Income, Derivatives, Alternative Investments, and Portfolio Construction, older material may still help conceptually, but your question practice should be aligned with the 2027 learning outcomes.
Use updated 2027 material for Quantitative Methods because reading titles and content flow have changed.
Use updated 2027 material for Equities because the area has been significantly reorganized.
Use updated 2027 material for Ethics because Standards guidance is split into separate readings and GIPS is not shown separately in the 2027 Level I outline.
For Economics, FSA, Fixed Income, Derivatives, Alternative Investments, and Portfolio Construction, older material may still help conceptually, but your question practice should be aligned with the 2027 learning outcomes.