So have we finally ended the long down trend?
I certainly hope so, though it will take at least another 4-6 weeks to know for certain whether this is a true trend reversal or a bump in the downward slope.
Whilst saying that though, in my opinion BLK has been dirt cheap for months so a rise like this need not necessarily be preceded by news. I'm not a TA or anything but my stance on these matters is hodl and enjoy the ride

I'd say the same, give it another month or two, then we can be certain.