Predicting which cars will sell and which won't often feels like a guessing game. Despite having numerous market analysts, automakers still make mistakes, especially in these unpredictable economic times. When they miscalculate, dealerships get stuck with unwanted cars.

The Market Day Supply is a straightforward metric that shows how over or undersupplied a particular model is by indicating how many days it would take to sell out. Using CarEdge Data, we've identified the new vehicles causing dealers headaches as they accumulate on lots with little chance of being sold soon.