Afterpay Ltd (ASX: APT) and SEEK Limited (ASX:SEK) shares are making waves on the ASX 200 on Tuesday. Here's what's happening...Afterpay Ltd (ASX: APT) and SEEK Limited (ASX:SEK) shares are making waves on the ASX 200 on Tuesday. Here's what's happening... ASX 200 flat: SEEK CEO exits, Afterpay sold off, BOQ surges higher