Freddie Mac's mortgage portfolio growth decelerated in May to $3.69 trillion, signaling weakening demand amid a restrictive rate environment that has held the 30-year fixed mortgage near 6.49% for six consecutive weeks. The dominant narrative centers on structural headwinds: elevated borrowing costs constraining housing affordability, slowing refinancing velocity, and expanding duration risks within the GSE's balance sheet as rate volatility persists. Treasury yield stability—the 10-year hovering between 4.38% and 4.46%—reflects embedded expectations of sustained Federal Reserve restrictiveness. Geopolitical de-escalation briefly catalyzed a five basis-point rate decline to 6.47% mid-month, yet gains proved temporary. The widening purchase-refinance spread signals origination margin compression for secondary market participants. Forward implications remain challenging. Persistent mortgage rate persistence above 6.40% will likely continue depressing origination volumes and portfolio expansion through the third quarter. FMCKL faces downside pressure from credit normalization and refinancing decline, with limited bullish catalysts unless Treasury yields compress materially.