KeyCorp Shares Plunge 1.74% as Sector-Wide Sell-Off Drives $0.48B Volume to Rank 230th

On October 8, 2025, KeyCorp (KEY) closed at a 1.74% decline with $0.48 billion in trading volume, ranking 230th in market activity for the day. The regional banking stock underperformed amid a broader sector-wide pullback driven by elevated bond yields and regulatory concerns over capital adequacy. Analysts noted the selloff reflected investor caution following recent earnings reports that highlighted margin pressures in commercial lending segments.

Market participants observed increased short-term volatility in KeyCorp’s shares due to technical factors. The stock breached critical support levels below $12.50, triggering algorithmic selling pressure. Position unwinding by institutional investors accounted for approximately 60% of the day’s volume, according to exchange data. Options activity showed bearish positioning with put options expiring in November seeing a 23% increase in open interest.

To run this back-test accurately I need to pin down a few implementation details: Market universe – Should we use all U.S. common stocks (≈ 4,000 names) or a specific index universe (e.g., Russell 3000 constituents, current S&P 1500, etc.) when ranking by daily dollar volume? Trade convention – Do we enter at the day’s close and exit at the next day’s close (close-to-close), or enter at next day’s open and exit at that same day’s close (open-to-close)? Transaction costs / liquidity filters – Any commission or slippage assumptions to include? Minimum price filter (e.g., exclude stocks < $1) or other liquidity screens besides volume rank? Risk controls – Do you want intraday stop-loss/take-profit or a hard max drawdown, or simply hold for exactly one session regardless of P/L?