Regulators call when anything is out of joint, may

Regulators call when anything is out of joint, maybe it’s a large holder from the 1 to 20, it’s in his account and they are doing a borrow on him, someone doing crosses from holdings, someone shorting, just don’t know I’ve never seen this before, it does not hurt the price the next morning or register that lower price on the record of the day so to me it’s weird, it has to be an insider MM or broker thing maybe TC knows as he is in the biz.