Southern California home-price gains are quickly evaporating, no matter who’s doing the counting.

This year’s falling mortgage rates gave house hunters more buying power. Instead, it appears buyers — unnerved by domestic and global economic uncertainty — are not willing to pay up.

Reports published by CoreLogic, California Association of Realtors, the Federal Housing Finance Agency, S&P/Case-Shiller and the Real Estate Research Council of Southern California all tell the same tale …

CoreLogic: Its six-county Southern California median selling price of $540,000 for all homes in July was up 1.9% over 12 months. A year earlier, appreciation ran 5.8%.

Realtors: Their six-county Southern California median of $550,000 for single-family resales in July was up 2.8% over 12 months. A year earlier, appreciation ran 5.2%.

FHFA: What the agency’s local indexes say about the second quarter …

Los Angeles County saw the smallest increase since 2012’s fourth quarter, a 3.8% year-over-year gain vs. a 5.8% increase the previous quarter and an 8.4% rise a year earlier. Gains ran an average of 7.4% in the past five years.

In Orange County, it was the smallest increase since 2012’s third quarter, a 2.6% year-over-year gain vs. a 4% increase the previous quarter and a 6.5% rise a year earlier. Gains have averaged 5.7% in the past five years.

For the Inland Empire, it was the smallest increase since 2012’s fourth quarter, a 4.2% year-over-year gain vs. a 5.6% increase the previous quarter and an 8.1% rise a year earlier. Gains have averaged 7.5% in the past five years.

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S&P: A second-quarter average of the index results for L.A. and Orange counties showed the smallest increase since 2012’s second quarter. Values rose 1.6% year-over-year vs. a 1.9% increase the previous quarter and a 5.4% rise a year earlier. Gains have averaged 5.6% over the past five years.