what does the ev 2p ratio tell you 
enterprise value compared to proven and probable reserves is a metric that helps analysts understand how well a company s resources will support its operations and growth ideally the ev 2p ratio should not be used in isolation as not all reserves are the same however it can still be an important metric if little is known about the company s cash flow reserves can be proven probable or possible reserves the proven reserves are typically known as 1p with many analysts referring to it as p90 or having a 90 probability of being produced probable reserves are referred to as p50 or having a 50 certainty of being produced when used in conjunction with one another it is referred to as 2p 