Several VC heavyweights—including Bill Gurley, Marc Andreessen and Fred Wilson—have voiced their (major) concern over the current burn rates of venture capital-backed tech companies. They argue companies are burning through cash at extremely high rates and will need to re-up sooner and sooner, raising the risk of a crippling down round. But while anecdotal evidence carries some value, it's more important to see what the cold, hard data shows. That's where PitchBook comes in. For a data-based and visual interpretation of this issue, click here for our latest blog post.