Your assets. Your percentages. Your Mast portfolio.

You thought we were done for the day? We spent the weekend working on a way to make Mast more personal. You can now build your own portfolio from supported assets on Robinhood Chain, choose how much goes into each holding, and invest in the mix with USDG.

The new builder is live at mast.bond/build. We have also updated the app’s navigation, wallet feedback and transaction progress so it is easier to see where you are and what happens next.

Start with your own mix

Choose between 2 and 10 supported stock or ETF tokens. Give your portfolio a name and set each asset’s percentage until the total reaches 100%. You can divide the allocation equally or adjust every weight yourself.

For example, a mix could put 40% into SPY, 30% into QQQ, 20% into SGOV and 10% into SLV. Those percentages are your choices, not a Mast recommendation. The builder shows the allocation as you make it.

The asset catalogue also shows tokens that are not available for portfolio creation yet. An asset needs supported pricing and a usable trading route before it can be selected. Being listed on Robinhood Chain does not automatically make it available in Mast.

Create once, then invest

Connect your wallet on Robinhood Chain and confirm the portfolio creation transaction. This creates a separate portfolio contract owned by your wallet. Creation costs a network fee; it does not invest your USDG.

Once the portfolio is confirmed, enter the USDG amount you want to invest. Review any required approval and confirm the investment in your wallet. The portfolio buys the assets according to your chosen weights, and you receive shares representing your portion of its holdings.

You can return to manage the portfolio and withdraw. USDG withdrawals depend on available liquidity and working prices; withdrawing your proportional share of the underlying tokens is also supported. The holdings are tokens that track the relevant markets, not direct ownership of the underlying shares or bonds.

Share the idea behind your portfolio

Copy mix link lets you share the portfolio’s name, assets and percentages. Someone opening the link can review the allocation and create their own portfolio from it.

Their portfolio is independent. Your link does not give you control over their funds, and later changes to your percentages do not change theirs.

You can also opt into keeping your mix balanced. The service checks daily and can rebalance when a holding drifts more than 2.5 percentage points from its target. Execution depends on prices, liquidity and the service being available; it is not continuous or guaranteed. Rebalancing incurs trading costs. Owners can change the percentages of existing holdings, while adding or removing an asset requires a new portfolio.

An app that makes the next step clearer

The product navigation keeps Portfolios, Build, Pairs and Indexes within reach. Your selected section is reflected in the URL, and browser Back and Forward restore it. The partner integration is labelled “For partners” to distinguish it from connecting your wallet.

Wallet connection now has clearer progress and error feedback. Portfolio transactions have a visible loader and separate submitted, confirmed and retry states, with a link to inspect the transaction. If checking confirmation fails, you can check the saved transaction again without submitting another creation transaction.

We have also tightened the investing layout and improved keyboard navigation. These changes help you move from choosing a product to reviewing an investment with fewer ambiguous steps.

The annual portfolio management fee is 0.35%, plus trading costs and network fees. Portfolio values can fall, and token, smart-contract, pricing and liquidity risks remain.

Open the builder, choose your assets and set your percentages. Your mix starts there.