Cathie Wood’s Ark Invest is closing one of her 9 exchange-traded funds. In a statement Tuesday, it said it would close its Transparency ETF (CTRU) at the end of July, after only eight months of trading. It will be Ark’s first ever fund closure.

The decision was prompted by Transparency Global announcing it would cease calculating the Transparency Index at the end of this month, the index which this fund sought to track. ARK said it could not find a suitable replacement.

According to an SEC filing, earlier this month, the board of trustees approved the winding down and termination of the fund unanimously. It will cease trading on the Cboe BZX Exchange July 26th. Shareholders can request a redemption of their allocation before the closing date.

The closure comes as ARK has endured routs across nine exchange-traded funds, especially the ARK Innovation (ARKK) vehicle, which is down 50% year to date.

Wood’s Transparency ETF was down 33% year to date as of the close Tuesday. It had targeted 100 companies which it identified as, “most transparent,” especially in the data offered to investors regarding performance and return potential. It also avoided companies which were involved with fossil fuels, tobacco, and alcohol. It had been seen by investors as ARK’s version of an ESG fund.

Notable among its holdings are Teladoc (TDOC), Netflix (NFLX), and Docusign (DOCU).

Bloomberg Intelligence Senior ETF Analyst Eric Balchunas said, “It’s intriguing because it doesn’t have a moralizing vibe to it, it’s like they’re saying if you go after transparency, you’re probably going to buy good companies.”