I'm assuming he's using the same sources he's used at least in the last year which have generally proved to be reliable. Furthermore, he's using several sources confirming essentially the same information. The same pattern prevails: favorable leaks boost the stock and traders, in the absence of immediate confirmation, take profits. However, this pattern has been somewhat different in the last two days, since it appears that those taking profits have been replaced by new buyers. One more thing...Mark's Facebook page includes lots of personal information in his profile. If he's a duper, I doubt he would make all this information available.