cointelegraph.com https://de.cointelegraph.com/news/valkyrie-bitcoin-futures-linked-etf-launches-on-nasdaq-with-share-prices-dropping-3-in-first-hour 2021-10-23, Börse, ETF, Fond, Futures, Nasdaq, ProShares, Regulierung, Unternehmen, USA, Valkyrie
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