Why is Steem and Hive always pumping simultaneously?

So today I suddenly saw that both Hive and Steem pumped at the same time. It also seems as if Steem fell back down to its previous levels at once, while Hive still remains up, but I am curious to see how this will develop. Maybe some sell walls were ruined, making it easier to pump the price of both tokens in the coming weeks.

But, why do these tokens pump at the same time? They are not really connected anymore, but somehow, they always move together. Are there some big whales coordinating this, someone who owned lots of Steem tokens, then got Hive tokens, and now it is in their interest to pump both at the same time? Or what is really going on?

I would love to know and understand this better. Anyway, hope $0.3 price for Steem is closer than in looks. It is nearly a 40% price increase required for this to happen, but I also know that it is just one big pump away, so let us hope it is just around the corner!