Plume Launches nBND Vault Backed by Fidelity Total Bond ETF (FBND)

Plume Ships Fidelity-Backed nBND

Plume, the real-world asset platform built on its own Layer 1 blockchain protocol, launched nBND on Monday, a tokenized vault whose primary reserve asset is the Fidelity Total Bond ETF (FBND). The October 5 announcement positions the product as a bridge between a traditional bond fund and programmable onchain finance, and the project's official X account confirmed the launch in a post the same day. FBND is a US-listed, actively managed fund that invests primarily in investment-grade bonds, high-yield debt and emerging-market securities, and Fidelity markets it to investors seeking income with some protection from equity-market volatility. nBND therefore hands vault users exposure to an existing fund's duration and credit allocation rather than to a synthetic yield product assembled for crypto. The reserve design also means the vault tracks thousands of underlying securities rather than a single Treasury bill sleeve, extending onchain exposure into corporate credit and emerging-market risk.

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Plume chief executive and co-founder Chris Yin framed the launch against the limits of current onchain fixed income. Short-duration Treasuries and money-market equivalents, he said, were the starting points for the sector, not its endpoint, and institutional allocators “want duration, and active management” alongside them, the same maturity variety and active oversight they use in traditional portfolios. The company backs the argument with market sizing from its own announcement: tokenized US Treasuries grew from $12 billion in April to $15 billion in June, roughly 25% in two months, against a global fixed-income market Plume puts above $100 trillion. Even the larger figure leaves tokenization a rounding error in traditional bonds, which is the company's stated case for pushing into duration. The launch carried no day-one capital disclosure, so the vault's size and the PLUME price reaction both stayed unquantified at publication.

What the $28 Billion Figure Covers

The bond fund behind the vault is large, but the headline number belongs to the ETF, not to nBND. Fidelity's official fund data showed FBND with $26.6 billion in assets as of June 30, 2026, while newer third-party estimates place the total near $28.2 billion. Neither figure describes capital sitting in Plume's vault: the company disclosed neither how many FBND shares were deposited at launch nor an initial total value locked (TVL) figure. The launch material also stops short of saying every nBND holder becomes a direct registered shareholder of the Fidelity fund, so the product should not be read as the ETF itself moving onto the blockchain.

Fund documents give FBND an inception date of October 6, 2014, an expense ratio of 0.36% and a portfolio of thousands of securities as of August, spanning Treasuries, mortgage-backed securities and corporate debt; its prospectus targets a high level of current income. Fidelity's participation runs through Cynthia Lo Bessette, head of Digital Asset Management at Fidelity Investments, who said the firm is working with Plume to bring financial products onchain and give investors programmable portfolio tools, with potential uses around collateral and capital access. Plume called nBND the beginning of the relationship and said other Fidelity assets could follow, without naming a fund or a date.

Plume's regulatory plumbing frames the product's standing. Its Kimber Transfer Agency unit holds a US Securities and Exchange Commission transfer-agent registration, secured in October 2025, covering recordkeeping for tokenized securities; the Bermuda Monetary Authority granted a digital asset business license in May that the company says covers regulated onchain vault management. The firm joined a DTCC digital-assets working group in August alongside Nasdaq and Charles Schwab, and agreed with Shinhan Asset Management to test a tokenized Korean won bond fund in an offshore proof of concept. Earlier distribution deals put an Ether.fi vault with a planned $100 million allocation live in June, fixed-income products tied to PIMCO and CMBI on Bybit, and Bitwise and Invesco-linked products inside Binance Wallet through its nBASIS vault.

Reading the Reserve Structure

In COINOTAG's view, nBND is a test of how far issuer disclosure carries a tokenized product. The vault's value rests on FBND shares held in reserve, yet Plume has not named a custodian, a redemption path or a one-to-one backing ratio, so the backing terms remain incomplete until the company publishes them. The strategic shift is easier to measure than the backing: with tokenized Treasuries at $15 billion in June against a traditional fixed-income market above $100 trillion, actively managed duration is the next candidate class for onchain migration. Readers watching whether the launch moves the market can follow COINOTAG's support and resistance levels for PLUME technical analysis. Plume described nBND as the start of its Fidelity work and named no second fund or launch date, leaving adoption targets, like the vault's day-one size, undisclosed.