BUZZ — StubHub gains after Citigroup upgrades to 'buy'
* Ticketing marketplace StubHub shares gain 4.5% to $6.21 in premarket trading * Citigroup upgrades rating on stock to "buy" from "neutral"; cuts PT to $7 from $9 * Says some investors are skeptical of co's raised EBITDA forecast, "given the World Cup tailwind in 1H26," but "based on robust app downloads in 3Q26, we be