Over the time there were a lot of good news, so Factom got more and more attention. Azure, yuanbaohui, the partnerships in China etc., and Milestone 2 will come soon. And, some days ago there was this information in one article:

„Ethereum founder Vitalik Buterin’s fund Fenbushi was an early investor in Factom.“
http://www.financemagnates.com/cryptocurrency/interview/factom-ceo-blockchain-based-transparent-mortgages-can-restore-trust-in-markets/

And my personal theory is, that this info brought the attention of Ethereum-Margin-Traders to Factom. I watched it the last days, the lending etc. I didn't watch it the time before but I believe that Margin-Trading is the reason for the extremely high volume the last days (it's all-time-high-volume).

It was clearly the reason for the dumping today back to 600k. Nearly no Factoids were left as loans and the interest rate was > 1.5% (which is very high - at the moment 0.1%) for some hours.