BUZZ-U.S. STOCKS ON THE MOVE-Roku, BioMarin, Amplitude

Feb 20 (Reuters) - U.S. stock index futures dipped on Thursday as investors shied away from risk-taking after another bout of tariff threats from U.S. President Donald Trump, while geopolitical worries and a cautious Federal Reserve further dented sentiment. .N

Roku Inc ROKU.O:
BUZZ - Gains after Jefferies upgrades to 'hold' nL3N3PB0PV

Walmart Inc WMT.N:
BUZZ - Seen posting higher Q4 rev, EPS; shares flat nL2N3PA0VY

BioMarin Pharmaceutical Inc BMRN.O:
BUZZ - Rises after Q4 results beat estimates nL3N3PB0UX

Birkenstock Holding PLC BIRK.N:
BUZZ - Drops after maintaining annual sales, margin forecast nL3N3PB0V3

iQIYI Inc IQ.O:
BUZZ - Slips after announcing $300 million convertible bond offering nL3N3PB0U6

Microsoft Corp MSFT.O:

Rigetti Computing Inc RGTI.O:

Quantum Corp QMCO.O:

Quantum Computing Inc QUBT.O:
BUZZ - Quantum computing stocks surge after Microsoft launches new quantum chi nL3N3PB0VL

Carvana Inc :
BUZZ - Drops after filing for stock offering nL3N3PB0TJ

Assurant Inc AIZ.N:
BUZZ - KBW upgrades Assurant to 'outperform' citing strong growth prospects nL3N3PB0PQ

Alibaba Group Holding Ltd BABA.N:
BUZZ - U.S.-listed shares of Alibaba rise on Q3 revenue beat nL3N3PB0XP

Diversified Energy Company PLC DEC.N:
BUZZ - Falls after $123 million stock offering nL3N3PB0VN

Amplitude Inc :
BUZZ - Rises on better-than-expected FY25 revenue outlook nL3N3PB0XR