Nebius' stock price has already tripled in 2025.Nebius Group (NBIS 3.88%) stock has been on an absolute tear in 2025. The stock's price has more than tripled, up around 225%, while also being down 33% from all-time highs established in October. Given that volatility, investors are likely wondering where Nebius' stock will go heading into 2026.While it will be difficult to post 200%-plus annual gains, Nebius may be in line to double in value, especially with all the massive artificial intelligence (AI) spend ...