Rebranding should have a good effect on the price. Good news.
Yes it does usually trigger a price rise, but not always as other news can overshadow the event - like the raiblocks nano rebrand that happened as the same time as the bitgrail incident, triggering a price fall. Not saying this will happen with vechain, just that it's always worth keeping an eye on other news as well, rather than the rebrand by itself.