(Bloomberg) -- A signal from the Bitcoin derivatives market points to the growing risk of a “short squeeze” that can stoke sharp rallies in the largest digital asset, according to cryptocurrency specialist K33 Research.Most Read from Bloomberg‘Train Lovers’ Organize to Support Harris and Walz in Presidential BidPart of Downtown Montreal Is Flooded After Water Pipe BreaksClimate Disasters Are an Affordable Housing ProblemThe metric is the funding rate for Bitcoin perpetual futures, which helps to