U.S.-traded spot Bitcoin ETFs saw increased demand on Monday, with net inflows reaching $667.4 million, the highest daily total in two weeks, as investors rushed to cash in on renewed base trading and strong Bitcoin prices. As Bitcoin ETFs Flock, Base Trading Nears 9%, Signals Corporate Revival According to data from Farside Investors, around $306 million of the inflows went to BlackRock’s iShares Bitcoin Trust (IBIT), which currently boasts net inflows of $45.9 billion. The renewed buying interest marks a sharp reversal from the outflows and caution seen earlier this year, with Bitcoin (BTC) continuing to trade above $100,000 for the eleventh consecutive day. The increased interest is partly due to the return of the base trading strategy, where investors go long on spot ETFs and short on futures contracts on the CME to capture risk-free returns. That yield, known as an annualized basis, has nearly doubled in the past month to near 9%, presenting an attractive arbitrage opportunity for institutional investors. “That base level has now returned to the area that is attracting professional capital. It’s a significant reversal from the sub-5% yields seen in April,” said senior analyst James Van Straten. CME Bitcoin futures volume reached $8.4 billion on Monday, the most since April 23 and indicating a revival of activity. Open interest rose by more than 30,000 contracts from April’s lows to 158,000 BTC, according to Velo data. While both volume and open interest remain below January highs, when BTC reached a new all-time high of $109,000, the recent surge suggests significant growth potential. The widening base appears to be drawing back participants who exited the market earlier in the year. For example, recent 13F filings revealed that the Wisconsin State Retirement Board sold off its Bitcoin ETF holdings in the first quarter. This decision was likely due to reduced arbitrage opportunities at the time. However, with the base now recovering, analysts predict that large investors could return to the market in the second quarter to take advantage of improved spreads. *This is not investment advice.