ProShares, the issuer of the first US bitcoin futures-linked exchange-traded fund (ETF), said concerns that costs associated with trading the derivatives would lead to tracking errors are unfounded. The ProShares Bitcoin Strategy Fund began trading on the New York Stock Exchange in October 2021, allowing investors to gain exposure to bitcoin (BTC) without having to actually own the cryptocurrency. The ETF, the world’s largest crypto fund, invests in regulated and cash-only bitcoin futures listed on the Chicago Mercantile Exchange (CME). From the beginning, observers speculated that BITO and other futures ETFs would significantly underperform bitcoin due to costs associated with rolling over, or selling expiring futures contracts and buying the next batch. “Concerns about the rolling costs are misguided; BITO has closely tracked the price of bitcoin since inception,” Simeon Hyman, global investment strategist at ProShares, told CoinDesk in an email interview.