Coinbase and Upbit Listings Trigger FLOCK and SPX Price Surge

Leading US crypto exchange Coinbase and South Korea’s Upbit have announced new altcoin listings, fueling sharp market reactions. Both platforms confirmed support for Flock (FLOCK), while Coinbase also added SPX6900 (SPX), a meme token. Trading on Coinbase begins September 9 at 9:00 AM PT, provided liquidity requirements are met.

Coinbase specified that SPX will be available as an ERC-20 token and FLOCK on the Base network, cautioning users against deposits on unsupported chains. The exchange will launch SPX-USD and FLOCK-USD pairs in phases, though regional availability may vary due to jurisdictional restrictions.

The listings triggered immediate volatility. SPX briefly climbed 6% from $1.33 to $1.41 before retracing to $1.32. In contrast, FLOCK saw a stronger reaction, jumping 15% from $0.26 to $0.30. This reflects the well-known “Coinbase Effect,” where new tokens gain exposure and credibility upon listing.

However, Upbit’s listing of FLOCK on its KRW market sparked an even larger rally. Trading began at 12 PM KST, sending FLOCK’s price from $0.31 to $0.99—a 219% surge and new all-time high—before stabilizing near $0.50, still up 84% on the day. Daily trading volume spiked 2,051% to $197 million, with Bithumb and Upbit accounting for nearly half of market activity.

These back-to-back listings underscore the power of regional exchanges to amplify global momentum. Coinbase’s reputation and Upbit’s dominance in South Korea combined to push FLOCK into the spotlight, with liquidity and volatility expected to remain high in the near term.