Nasdaq-100 futures rise 1.7% after Wall Street's worst session since April 2025, as investors assess AI spending risks, data centre restrictions and fresh economic data. Wall Street's tech stocks plunged as fears over slowing AI spending triggered a $1 trillion market value loss among the 'Magnificent Seven,' led by Nvidia's $440 billion decline in value.. Oracle has cancelled a significant multibillion-dollar chip leasing deal with Tencent amid US government concerns.