The ZENG decline has been remarkably consistent. Today the closing PPS and average PPS for the day were equal at .0052. Can't know if the past steady rate will go into the future but - the past 3 month's data includes the PR of expected revenue (1/6/10),the 2 day bump, and return to the continued decline.
ZENG at Trip Zeroes by April 23, 2010. Wasn't long ago that sub-penny was unthinkable by many. Or that .0075 that PDGT shareholders were traded into ZENG would never go negative.