NYMEX end of day data floor trading volume change from the data source

Effective December 22, 2014, Platts' NYMEX end of day data provider Commodity Systems, Inc. has implemented a change so floor trading volume represents only pit session (RTH: regular trading hours) trading activity. Prior to this date, volume data for floor trading included trading activity from both floor trading and electronic sessions combined. The following are the floor trading contracts affected:

Floor trading contracts Symbol Prefix NYMEX Light Crude Floor XNCL NYMEX Henry Hub Natgas Floor XNNG NYMEX RBOB Floor XNRB NYMEX NY ULSD Floor XNHO

The corresponding combined trading contracts:

Combined trading contracts Symbol Prefix NYMEX Light Crude Combined XNCC NYMEX Henry Hub Natgas Combined XNNC NYMEX RBOB Combined XNBR NYMEX NY ULSD Combined XNHC

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