The spot ether exchange-traded funds (ETFs) launched by Chinese fund manager ChinaAMC saw more than HK$5 million (US$640,780) in net inflows as of mid-day Wednesday, after reaching HK$3.77 million on Tuesday, the largest since launch, as investors anticipate US approval of similar products.

The ETF saw more than 1.28 million shares traded on Tuesday. On most days since its April 30 launch, trades have lingered around 500,000 shares, according to Hong Kong stock exchange data. On Tuesday, net inflows were HK$3.77 million.

The other two spot ether ETFs in Hong Kong, issued by investment firms Harvest Global, Bosera and HashKey Capital, also saw higher-than-usual volumes this week. The prices of all three ETFs climbed by more than 18 per cent on Tuesday.

The turnover of Hong Kong’s spot crypto ETFs, despite being hailed as a major step in the city’s pursuit to become a virtual asset hub, has remained meagre on most days since their launch. The trading volume is a trickle compared with that of spot bitcoin ETFs in the US, which approved the products in January.

While ETFs are seen as an important way for volatile virtual assets to attract mainstream investors, possibly helping to boost prices, the initial impact of Hong Kong’s launches on the wider global cryptocurrency market appeared to be “muted”.

Analysts have pointed out that Hong Kong’s ETF market is significantly smaller than that of the US, and argued that the city’s spot crypto ETFs – the first of their kind in Asia – are important for the global adoption and acceptance of virtual assets.

The jump in crypto ETF trading volume in Hong Kong this week came as cryptocurrency prices surged following reports of an increased likelihood that the US Securities and Exchange Commission (SEC) would approve spot ether ETFs.

Bloomberg Intelligence ETF analysts Eric Balchunas and James Seyffart on Tuesday raised the estimated probability of the approval from 25 per cent to 75 per cent, suggesting a possible about-face in the SEC’s stance on these products.

Ether’s price has surged more than 20 per cent to above US$3,700 this week. Bitcoin also climbed by about 4 per cent to surpass US$71,000.

The SEC is expected to make a decision on at least one of the ether ETF applications by May 23.