Property data in Dubai is always a dicey barometer of the market. In the absence of public records of sale transactions, agencies use their own methods and research to arrive at their own conclusions.<br/><br/>The property companies often acknowledge that the data doesn't always represent a completely accurate picture of the market.<br/><br/>Today's report from Asteco is a good example.<br/><br/>In the mix of data about stablising rentals and drops in some neighbourhoods, the property company reported that prices for apartments in downtown Dubai fell 8 per cent in the third quarter compared to the previous quarter.<br/><br/>That's a dramatic number. And it fit with a drop of 10 per cent in Discovery Gardens and seven per cent in Jumeirah Lakes Towers (JLT), compared to the previous quarter.<br/><br/>But the downtown area, which is typically defined as the area around Burj Khalifa, is a different beast than the affordable apartments in Discovery Gardens and JLT. Downtown is actually one of the more popular areas in Dubai, Asteco chief executive Elaine Jones said.<br/><br/>Sale prices dropped Dh13,910 a square metre to Dh11,850 a square metre in the last year, but the eight per cent drop in the last quarter is a bit of an anomaly. <br/><br/>"The amount of transactions is not particularly high, which means the data we have can be easily influenced by a handful of transactions," Ms Jones said.<br/><br/>The data from Asteco's "basket of properties" is accurate, but it may unfairly portray what's actually happening downtown, she said.<br/><br/>