Investor Help (NO Ihub questions)

[User336447]

If there is someone with an unusually large sell order marked AON, does the MM have to show that order when it is the lowest ask for that MM? Could the bid ask spread go above this sell order's limit? Wouldn't it actually be in the MM's favor to let the bid ask spread go above this order so they could short high and cover low? To fill that large AON sell order located below best bid, an MM would want to short down bids or absorb ask hits with an ask (marked short) right? Because then they could cover their short position (once it is large enough) and therefore buy the sellers large AON sell order in one trade. What if the seller canceled the order prior to the MM shorting the full amount for the intended cover. When any of this happens, are T-trades involved in some way?