The new standard is now fully in place, as in the first few months after February 12 the LEAP roots and additional roots needed to handle large numbers of options for a given issuer were consolidated into a single root ticker for a given underlying symbol. Options Clearing Corporation's (OCC) Options Symbology Initiative (OSI) mandated an industry-wide change to a new option symbol structure, resulting in option symbols 21 characters in length. March 2010 - May 2010 was the symbol consolidation period in which all outgoing option roots will be replaced with the underlying stock symbol.