Mortgage Rates August 22, 2026: Why Rates Are Moving So Fast

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Mortgage rates took some surprising turns this Saturday, showing just how volatile the housing market has become. The average 30-year fixed mortgage rate climbed 14 basis points to 6.64% while the 15-year fixed rate dropped to 5.88%. And the biggest move came from the 51 ARM, which jumped 49 basis points to 6.74%. So, what's driving these sudden changes? The biggest factor is the bond market. Mortgage rates are heavily influenced by longer-term bond yields, and investors are currently watching inflation, government borrowing, and the growing federal deficit very closely. US government debt has