OK, it started with the MYEC board some days ago. If you check their activity the stock was red like 6 or 7 days in a row, and VNDM was prominent on the ask and it was felt that they were a "dilutive MM", apparently working some scheme to drive the prices down consistently. Anyway that was the theory.
Then yesterday VNDM showed up on ITNS ask for a few hours. See also post #28452.