I just reviewed the details of the prospectus Morgan Stanley filed with the SEC for their proposed Bitcoin trust, and there are several interesting aspects about how they structure custody.

What stands out is that Morgan Stanley has chosen to work with two different institutions for managing their Bitcoin holdings. On one hand, they are using a platform specialized in digital custody to store the bitcoins directly, while Bank of New York Mellon takes on the role of traditional securities custodian, fund administrator, transfer agent, and cash custodian. Essentially, BNY handles all the classic administrative and financial infrastructure you'd expect from an institutional ETF.

The storage structure is quite conservative. Most of the bitcoins will be stored in offline cold storage vaults disconnected from the internet, significantly reducing the risks of unauthorized access. Only a portion would be temporarily moved to hot wallets during creation or redemption operations. Custody insurance coverage exists, although as a securities custodian, BNY notes that this insurance is shared among multiple clients and may not cover all potential losses.

To determine the fund's value, they will use CoinDesk's Bitcoin Benchmark, specifically the 4 PM New York settlement rate. This index aggregates data from major spot exchanges, providing considerable transparency to the daily valuation process.

The ETF itself will be a passive vehicle that simply tracks Bitcoin's price through direct holdings. No derivatives, no leverage, just real Bitcoin. It’s the approach many institutions have been waiting to see.

This structure shows how traditional securities custodians like BNY are adapting to serve the crypto industry. When you see a bank of BNY’s magnitude taking on these roles as custodian in a Bitcoin ETF, it truly marks a milestone in the institutionalization of the space. Morgan Stanley is clearly designing this to meet institutional investors who require the security and governance standards they know from the traditional financial world.