Ark Invest买入1540万美元Robinhood股票并扩大比特币ETF持仓

The assessment is based on a strong consensus across multiple, independent sources of varying authority. The highest-authority source, The Block, directly and explicitly confirms both claims in the statement: the purchase of $15.4 million in Robinhood shares and the additional investment in its own Bitcoin ETF (ARKB). This is corroborated by several other reputable crypto news and data platforms, including Cryptonomist, Phemex, Bitget, and Rootdata. The specific monetary value of the Robinhood purchase ($15.4 million) is consistently reported, adding significant credibility. There are no contradictions among the relevant sources. The only source that does not support the statement has been correctly identified as irrelevant, as its mention of '$15.4 million' and 'Ark Invest' is purely coincidental and relates to a different company and context. The overwhelming and consistent evidence from multiple sources provides high confidence that the statement is true.