Quantum Computing Plunges 5.41% as $1.11 Billion Volume Dumps 28% to Rank 88th

On October 8, 2025, Quantum Computing (QUBT) closed at a 5.41% decline, with a trading volume of $1.11 billion, marking a 28.12% drop compared to the previous day's volume. The stock ranked 88th in trading activity among listed companies on the day.

Analysts noted that the sharp volume contraction and price drop reflected cautious investor sentiment amid broader market uncertainty. While no direct corporate developments were disclosed for Quantum, the underperformance aligned with sector-wide declines in technology equities, particularly those with exposure to high-volatility subsectors like quantum computing hardware and cloud infrastructure.

The back-test framework requires clarification on four key parameters: market universe scope (e.g., U.S. equities only), weighting methodology (equal-weight vs. cap-weighted), trading timing (close-to-close vs. open-to-close execution), and cost assumptions (commission/slippage inclusion). Using industry-standard defaults where unspecified, the test will construct daily top-500 baskets from January 1, 2022, to evaluate one-day holding period performance. Price adjustments for corporate actions will be applied unless otherwise stated.