Amid a weak economy, global residential real estate is showing the slimmest price gains since 2009. As of the second quarter, prices rose just 1.7% compared to the same quarter the year before, according to Knight Frank, an international property consultancy based in the U.K. Most of the spikes occurred in the Asia-Pacific region, where prices jumped 8%. Both North America and Europe showed declines. Two general trends appear to be at play this year. In markets where prices rose, the gains were driven by buyers outside those countries, predominantly wealthy Chinese investors. Where prices fell, the losses tended to be linked to trouble in the eurozone. Above are the best- and worst-performing real estate markets in the first half of this year, according to Knight Frank.