i disagree. of course i am assuming that by "stimulus" you mean something that kicks starts the rise. in which case we don't really need something like that to start the rise. it can simply begin after hitting the bottom and as everyone gets tired of waiting for a lower price. just like all the previous times that price was stuck in a low bottom. for example the 2014 bottom at $220.

although it is possible to  see some sort of hype initialize the rise like the ignition under the rocket, it rarely starts like that. those "stimuluses" have mostly happened after the rise had begun.