Over the last 12 years, Coronado (defined for the purpose of this analysis as all attached and detached residential properties listed with the San Diego Multiple Listing Service for the 92118 zip code) has seen its inventory (or the daily average number of properties listed for sale) fluctuate.The ratio of ‘Inventory/Sales’ has gone from a historical trend of 6 to now 17 (with some sharp periodic upward spikes over the last 2 years). Essentially, what this means is that historically for every house sold 6 were for sale. Over the last 2 years, that number has averaged 17 and climbing, nearly a 200% increase.