It depends on your portfolio, and I wouldn't want to give you trading advice. If you're overexposed and worried about a drop, then yes, now would be the time to take some profits. If you think that the price will rise on the spheroidisation results, you might consider holding and waiting for that to occur instead.
I realise that's not much help, but if I could pick the absolute tops and bottoms I'd have retired well before now.
