Months of Supply Inventory (MSI) quantifies the supply/demand relationship by measuring how many months it would take for all current homes listed on the market to sell at the current rate of sales. The long-term average MSI is around three months in California, which indicates a balanced market. An MSI lower than three indicates that there are more buyers than sellers in the market (meaning it’s a sellers’ market), while a higher MSI indicates there are more sellers than buyers (meaning it’s a buyers’ market). The San Francisco market tends to favor sellers, at least for single-family homes, which is reflected in its low MSI. However, we’ve seen over the past 12 months that this isn’t always the case. MSI indicated that single-family homes and condos began the year in a buyers’ market. MSI declined in the first half of the year for single-family homes, indicating that the climate shifted from a buyers’ market to a sellers’ market. However, in the third quarter, MSI rose substantially, indicating a buyers’ market once again. In October, sales rose considerably, dropping MSI below three months — back to a sellers’ market. Condo MSI moved from a balanced market at the end of the first quarter of 2023 to a buyers’ market, and it has remained a buyers’ market since April.
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