Been thinking about mortgage rates from back in September 2023 and how wild the swings were. At that time, 30-year fixed rates were sitting around 7.68%, which honestly felt pretty high compared to what people got used to a few years before. The 15-year options were lower at around 6.76% APR, but obviously you're stuck with way bigger monthly payments since you're crushing the loan in half the time.

What I found interesting looking back at September 2023 mortgage rates data is how the APR tells a different story than just the interest rate alone. Like, the 30-year was quoted at 7.68% but the actual APR was 7.59% when you factor in lender fees. Makes a difference when you're calculating what you'll actually pay each month. On a $100k loan at those rates, you're looking at like $711 monthly before taxes and insurance.

Jumbo mortgages were a bit better at 7.43% back then, which tracks since they're usually priced differently. The whole mortgage rates September 2023 period was basically showing that if you wanted to refinance or buy, you had to get serious about your credit score and debt ratios to score better terms. People were doing everything - maxing out down payments, checking their DTI ratios, shopping lenders hard. The Fed's decisions were definitely pushing rates around during that window.

If you're comparing loan types, conventional loans needed that 20% down and solid credit, but FHA and USDA programs were more flexible if you didn't have the cash ready. VA loans were the play if you qualified. Honestly, the mortgage market back in September 2023 just showed how many levers you could pull if you actually knew what you were doing - rate locks, discount points, comparing APRs across lenders. Most people just look at the headline rate and miss the whole picture.