you must be knew to the stock world. when the bid is big and the there is a spread like we have that most of the time means something is up. i have a massive hand full of shares here. When i was buying i put 5 6 and 7 million on the ask with my bid for less than the ask to make people sell to me on the bid instead of having to buy the ask. Its called a fake wall. no one knows for sure what is happening but the person or mm doing it. Happens all the time.