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Serangoon resale price index

Monthly, quality-adjusted, updated daily as sales register. Not an average price: the index tracks what the same flat would trade at, so a month of mostly small-flat sales doesn't read as a market drop.

How this index works

• Quality-adjusted. Every registered resale feeds a statistical model that separates the market's level that month from what was sold (size, floor, lease, location). The official quarterly index is built on the same idea; this one is monthly, per town, and refreshed daily.
• Final months never change. A month's value is locked the first time it is published complete. If an early provisional print differed, the revision is shown, not hidden.
• Provisional months are marked. Resales reach the public record weeks after the deal, so the newest month or two are based on partial data and shown hollow until complete.
• Thin samples are suppressed. A town averaging fewer than ten sales a month gets no line of its own; a line drawn through that little data would be noise.

Methodology in full: about the data and model · the model also grades itself in public.

Index base: 100 at the first published month (shown on the chart). The shaded band on town pages is the statistical uncertainty of that town's deviation from the national index. The purple overlay is the official HDB Resale Price Index (quarterly), rescaled to this chart's base for comparison. Sources: data.gov.sg resale registrations and the HDB RPI, both public.