Group 1 - Nebius Group NV (NASDAQ:NBIS) has increased by 21.5% to $48.87 following the announcement of securing $1 billion in convertible notes for AI development [1] - Arete Research analyst initiated coverage on NBIS with a "buy" rating and a price target of $84, indicating a 113% premium to the previous closing price [1] - Since the beginning of 2025, NBIS shares have risen approximately 76% [3] Group 2 - Options trading activity for NBIS has surged, with 203,000 calls exchanged compared to 44,000 puts, indicating strong bullish sentiment [2] - The weekly 6/6 50-strike call option is the most popular among traders, with new positions being opened [2] - Currently, only three analysts cover NBIS, all with "buy" ratings, suggesting potential for further upward movement if more analysts provide positive coverage [4]