Plume on Monday launched nBND, a tokenized vault whose primary reserve asset is shares of the actively managed Fidelity Total Bond ETF (FBND), pushing onchain fixed income beyond the short-duration Treasury products and money-market wrappers that have dominated the segment through 2025.

Until now, onchain yield products have relied almost entirely on U.S. Treasury bills and equivalents, instruments with little credit or interest-rate risk. FBND holds investment-grade corporate debt, high-yield bonds and emerging-markets paper, so the vault transmits duration and credit exposure directly to token holders.

"While the onchain fixed income market was originally concentrated in short-duration Treasuries and money market equivalents, these are the starting points, not the destination," said Chris Yin, CEO and co-founder of Plume. "Institutional allocators want duration, and active management, the same building blocks they use offchain."

What does FBND add to the onchain fixed income market?

FBND is an exchange-traded fund managed by Fidelity, with holdings spanning investment-grade corporate debt, high-yield bonds and emerging-markets sovereign and corporate paper. Until this year, onchain yield products priced almost exclusively off the front end of the U.S. yield curve, instruments with average maturities under 90 days.

Plume cited rwa.xyz figures showing the tokenized U.S. Treasuries market grew from $12 billion in April 2026 to $15 billion in June. Plume separately cited Chainlink for a global fixed-income reference above $100 trillion. Both figures describe a market that has expanded off a small base, with BUIDL, USDY, OUSG and similar products absorbing most of the inflows.

The vault introduces credit-spread risk, currency risk and longer-duration exposure to a sector that previously offered none of those. Whether institutional allocators accept that risk onchain is the central question for nBND's reception.

What is Fidelity's role in the vault?

Fidelity is quoted in the Plume announcement but the release does not describe the asset manager as issuer, custodian or counterparty of the vault. Plume's statement says the vault holds FBND shares as its reserve asset, a purchase of an existing listed ETF rather than a product Fidelity built to distribute onchain.

The distinction carries operational weight. A wrapper that buys an off-the-shelf ETF inherits that fund's existing liquidity, NAV discipline, SEC disclosures and tax treatment. A purpose-built onchain product from Fidelity would require additional regulatory work and could open the asset manager to a different compliance perimeter.

"As tokenized assets and on-chain applications become more integrated into mainstream market infrastructure, a collaborative ecosystem is essential to expanding investment access," said Cynthia Lo Bessette, head of digital asset management at Fidelity Investments.

Until both firms clarify the arrangement, nBND functions as a wrapper that buys a public ETF, not as a Fidelity-issued onchain product.

What terms has Plume disclosed?

Plume has not published a target size, management fee, redemption schedule or minimum allocation for nBND. The vault does not yet appear on Plume's vaults page, which lists nTBILL, the network's short-dated Treasury vault, at roughly $4.5 million in assets and a 3.7% yield as of Monday.

PLUME, the network's native token, traded at $0.0188 on Monday, up 4.3% over 24 hours, for a market value of $124.3 million, according to CoinGecko. The token is up 38.6% over 30 days and remains down 92.4% from its all-time high.

Will onchain cash products gain traction past the launch?

Supply growth in tokenized cash products has outpaced actual trading activity, according to Dune data cited in industry reporting. Tokenized money funds tend to pay less than their offchain equivalents, and most tokenized cash never trades on a secondary venue, suggesting wrappers have functioned more as distribution rails than as active markets.

nBND's active-management structure brings a different set of mechanics: periodic NAV revaluation rather than a stable-par claim. Holdings rebalance on FBND's schedule, and token holders absorb mark-to-market moves on the underlying corporate and sovereign book.

Plume has not announced a date for nBND deposits. The network's next market-structure disclosure will be the vault's subscription terms, alongside a clearer statement from Plume and Fidelity on custody arrangements and any operational role the asset manager plays.