When Thea is talking to Moira in the club she folds her arms but in the next shot they are no longer folded. If they were we would see her right hand on her left arm.
The SEC regulates stock brokers and brokerage houses; in the US, banks are regulated by the FDIC, the Federal Reserve, the OCC, and various agencies at each state. While Moira may not have known this, Walter should have.
When Oliver and Roy jump to the ground as the storage container explodes, the corner of the mat the actors jumped onto in order to avoid injury comes into frame from Colton (Roy) hitting it.