Nebius Group Surges 2.97% Amid 42.15% Volume Plunge Slips to 86th in Trading Volume Rankings

Nebius Group (NBIS) rose 2.97% on October 1, 2025, with a trading volume of $1.35 billion, representing a 42.15% decline from the previous day's activity. The stock ranked 86th in trading volume among listed companies, indicating reduced liquidity despite the upward price movement.

Recent developments highlight strategic partnerships in cloud infrastructure expansion, with executives emphasizing long-term growth through AI-driven solutions. Analysts note that the stock's performance remains tied to broader market sentiment toward tech stocks, though its volume contraction suggests cautious positioning among traders.

Back-testing challenges persist due to the dynamic nature of high-volume stock universes. Current methodologies require static tickers or simplified frameworks, such as focusing on proxy assets like SPY or individual stocks, to isolate volume-driven return patterns effectively.

To run this back-test faithfully, we need additional practical details, as the current toolset handles signals for a specific ticker or static event dates. The "top 500 stocks by daily trading volume" is a dynamic cross-section that changes daily, involving hundreds of tickers beyond the single-ticker back-test engine's capacity in one pass.

Could you clarify which approach aligns with your objective? Options include narrowing to a proxy security like SPY, using a static universe such as the S&P 500, or testing individual stocks post-top-decile volume days. I will proceed accordingly once confirmed.