SoftBank Group posted a surprise quarterly loss Wednesday and the Japanese company's revenue also missed analysts' estimates.

Japanese technology investor SoftBank Group booked a surprising net loss of 369.2 billion yen ($2.4 billion) in the October-December quarter as valuations at its Vision Fund investment arm fell.

SoftBank Group Corp. swung to losses for the December quarter due to a drop in the value of the Vision Fund’s public holdings, boding ill for founder Masayoshi Son who has to raise $500 billion for the Stargate artificial-intelligence project.

TOKYO (Reuters) -Japanese technology investor SoftBank Group booked a net loss of 369.2 billion yen ($2.4 billion) in the October-December quarter as valuations at its Vision Fund investment arm fell. The loss will further raise questions about SoftBank's plans for one of its most ambitious undertakings - a hefty investment in OpenAI.

Japan's SoftBank Group is set to make a quarterly net profit of 234 billion yen ($1.54 billion) on Wednesday as shares in its telecommunications holdings edge up and the post-listing performance of Swiggy is seen boosting the value of its portfolio of unlisted technology startups.