MIAX Options has modified the maximum opening width parameters for the SPY options used in the SPIKES Special Settlement Auction. The updated Settlement Reference Price Opening Width and Valid and Priority Quote Width tables used for opening the SPY February 19, 2021 expiration are now in effect. These values will be used for the January 20, 2021 SPIKES Settlement Process.
Please refer to MIAX Options Regulatory Circular 2021-04 for the updated quote width tables.