Zcash spot ETFs took in $98.2 million in the week ending September 18, the largest inflow among 14 crypto fund products tracked last week, while Ethereum funds posted the only net outflow at $140 million.
The weekly tally, compiled from fund flow data and reported by BeInCrypto, marks the fourth straight week of positive flows for Zcash products since their launch in late August. No other crypto ETF category matched the pace.
Grayscale’s ZCSH, the first US spot ETF built around a privacy coin, has pulled in more than $230 million this month against roughly $414 million in total holdings reported earlier in September. A fund absorbing more than half its existing size in a few weeks is rare in any asset class, and it has drawn attention to how small the underlying market remains.
Last week’s leader was different. US spot Solana ETFs took in $60.7 million in the prior week, the best week of any major category at the time. Zcash’s $98.2 million now tops that, an unusual result for a product barely a month old.
| Fund | Flow | Note |
|---|---|---|
| Zcash spot ETFs | +$98.2M weekly | Led all 14 crypto products |
| Ethereum spot ETFs | -$140M weekly | Week’s only net outflow |
| Grayscale ZCSH | +$230M this month | Against roughly $414M in holdings |
| Solana spot ETFs | +$60.7M prior week | Previous weekly leader |
The totals hide a rough ride underneath. Both Ethereum and Bitcoin products sold off midweek before recovering, and Friday brought one of the stronger single-day sessions of the month. Spot Bitcoin ETFs took in $433 million that day, led by Fidelity, as bitcoin climbed back above $80,000 after touching a low near $75,000 on September 15.
Zcash itself has been one of the year’s more violent stories. The token hit $1,521 earlier this month after commentary from a Paradigm co-founder circulated, and it has traded in a wide band since, sitting near $1,215 in recent sessions. That is a large move for an asset that spent years below $50, and it has made ZEC one of the most traded altcoins on derivatives venues this month.
A privacy coin at the top of the flow table
The flows reflect a simple fact: Zcash now has an institutional wrapper it never had before. Before the late-August launch, US investors who wanted exposure had to buy the token on an exchange and custody it themselves. The ETF format moves that exposure into brokerage accounts, and the flow data suggests a portion of demand was waiting for exactly that.
The listing is also notable on regulatory grounds. Privacy coins have faced delistings and scrutiny in several jurisdictions over the years, which makes a US spot ETF for one of them an outlier among fund products. Grayscale cleared that bar, and the demand numbers suggest the market noticed.
Grayscale filed for a 3-for-1 share split on ZCSH after the record volume week, a mechanical move that lowers the per-share price and can widen the retail audience. Splits do not change fund economics, but issuers typically file them when they expect continued demand from smaller accounts.
Volume data from the week backs up the flow story. Zcash products accounted for roughly a third of all spot crypto ETF volume at points during the stretch, a share far out of proportion to the fund’s size and a sign that trading activity, not just net creation, was concentrated in the new product.
Analysts watching the fund have pointed out the scale mismatch: a fund taking in more than half its size in weeks can distort the underlying token market simply through routine creation activity, because Zcash’s daily trading depth is a fraction of what bitcoin or ether venues offer. That makes the flow numbers themselves a market-moving input, something smaller crypto funds rarely achieve.
Ethereum’s outflow week
Ethereum’s $140 million weekly outflow stands out in a market where most categories took in money. Ether traded near $2,500 over the week, up from levels closer to $2,400 earlier in the month, but fund investors were net sellers anyway.
The outflow does not necessarily signal a bearish turn. Ethereum spot funds, which launched in July 2024, took in money for nine consecutive days in late August, and weekly figures for a single product line swing with a handful of large creations and redemptions. Still, the contrast with a privacy coin leading all categories is the kind of rotation that gets noticed on trading desks.
On-chain data adds some texture. Ethereum holders have pulled more than a million coins off exchanges since early summer, a pattern that usually signals accumulation by longer-term holders even as fund flows wobble. The divergence between on-chain behavior and fund flows is not new, but it makes single-week readings less useful than they look.
What it says about the market
Crypto ETF flows remain a noisy indicator. Small products can post large percentage inflows on modest dollar amounts, and Zcash’s derivatives market is thin enough that fund buying can move the underlying price in ways bitcoin or ether funds cannot. That cuts both ways: the same thinness that amplifies the rally on inflows would amplify it downward if the flows reverse.
The next weekly print will show whether the Zcash demand is a launch effect that fades or a durable allocation. With the Federal Reserve back in hiking mode after its September 16 increase to a 3.75-4 percent target range, and risk assets sensitive to every inflation reading, fund flows across the board may stay choppy into October.
For now, the week’s message is that ETF wrappers keep reshaping which corners of crypto attract money. A privacy coin leading all fund categories would have been an unlikely call a year ago. The flows say otherwise.