Why Is Coinbase (COIN) Stock Down 10.10% Today, Sep 15? Failed CLARITY Act Vote and Pre-Fed Risk-Off Selling Hit Shares

Coinbase shares sold off sharply after the U.S. Senate failed to advance the CLARITY Act, undermining expectations for a clearer federal framework for digital-asset markets. The move coincided with broad crypto risk-off positioning ahead of the FOMC decision, reinforcing pressure on crypto-linked equities whose revenues are sensitive to trading activity and volatility. Near-term focus shifts to renewed legislative traction and post-Fed risk appetite.