Billions of dollars have flowed into the U.S.-listed spot bitcoin

Most of the investment is likely driven by bold, strategic bullish directional bets rather than market-neutral arbitrage plays, data analysis suggests.

As the U.S. spot bitcoin ETFs continue to attract billions of dollars, the nature of the investment suggests that most of the funds are being driven by bold, strategic bullish directional bets rather than classic market-neutral arbitrage plays, at least according to an analysis of available data.

After a strong start to the year, April saw another $2.97 billion pour into the 11 spot ETFs, with an additional $2.64 billion flowing in so far this month, according to data from SoSoValue. This has brought the total net inflow since their January 2024 launch to over $41 billion.

Institutions are known for using these ETFs to set up non-directional arbitrage plays, aiming to profit from any price differences between the futures and spot bitcoin markets. This strategy, called cash and carry arbitrage, involves buying ETFs and simultaneously selling CME futures to collect the futures premium while circumventing the risks associated with price direction.

However, the magnitude and timing of the recent inflows, especially since early April, suggest that they are being driven more by bullish directional bets than by arbitrage plays. This is supported by an analysis of the Commitment of Traders (COT) report, published weekly by the Commodities Futures Trading Commission (CFTC).

The data from the COT report, which provides insight into the collective market positions of various trader categories, shows that leveraged funds, typically encompassing hedge funds and diverse money managers, have reduced their net shorts.

According to Tradingster’s analysis of the CFTC data, these funds had a net short position of 14,139 contracts in the latest report, compared to 17,141 contracts at the beginning of April.

If carry trades were the primary driver of the ETF net inflows, one would expect to see an increase in the number of shorts held by leveraged funds. These funds are largely focused on making a profit from price changes over time, whereas carry traders are typically concerned with the short-term implications of futures and options positions.

"CFTC data shows that leveraged funds did not meaningfully increase short positions, suggesting that most of the flows were directional bets, not arbitrage, as evidenced by the lack of a significant increase in short positions held by leveraged funds," said Imran Lakha, founder of Options Insight, in a recent blog post on Deribit.

This shift in the nature of inflows into the ETFs suggests that large players are increasingly using the ETFs to express a clear market outlook on bitcoin’s future direction.

Bitcoin last changed hands at $102,700 at press time, according to CoinDesk data.