MIAX Regulatory Circular 2013-18 identifies options classes to start trading on April 8, 2013 to be included in the MIAX Penny Pilot Program.
As part of the MIAX Penny Pilot Program select options may trade in $.01 increments when priced below $3.00. Options priced at $3.00 and above will trade in $.05 increments.
Options overlying PowerShares QQQ (QQQ) and iShares Russell 2000 Index (IWM) will trade in $.01 increments for all series regardless of the price.