GRNB vs MAMB

GRNBAVanEck Green Bond ETF

MAMBDMonarch Ambassador Income Index ETF

In short

GRNB Its peer group is stacked with total-bond-market giants. GRNB goes narrow instead: only dollar-denominated green bonds funding environmental projects, issued worldwide by governments, supranationals and companies. A 2017-vintage specialist at 0.20%.

MAMB Most global bond funds buy bonds and sit still. MAMB tracks an index that reads employment data, sorts the economy into cycle phases, and reshuffles about a dozen bond ETFs monthly. A macro overlay in index clothing.

Stated mandate

GRNB The fund seeks to track the S&P Green Bond U.S. Dollar Select Index before fees and expenses. The index covers U.S.-dollar-denominated green bonds financing environmentally friendly projects and issued globally by supranational, government, and corporate entities.

MAMB The Fund seeks to replicate, before fees and expenses, the performance of the Monarch Ambassador Income Index. It invests at least 80% of assets in Index constituents and uses a replication-indexing strategy.

Why people hold it

• GRNB The mandate is the point: bonds whose proceeds fund environmentally friendly projects, tracked to the S&P Green Bond U.S. Dollar Select Index instead of a generic aggregate benchmark.vaneck.com
• 0.20% a year runs below the typical fund in its category, and it sits in the top quartile of a large aggregate-bond peer group on how closely it tracks and what it holds.
• Global sourcing, dollar pricing: supranational, government and corporate issuers, roughly 500 bonds, all USD-denominated, so no currency translation layered on top.
• Distributions land monthly, and the fund has been running since 2017.

• MAMB A rules-based index reads employment data to judge the economic phase, then tilts among treasuries, munis, mortgages, high yield and convertibles. It refreshes monthly.sec.govsec.gov 2
• One ticker holds roughly a dozen bond ETFs, plus room for up to 12.5% in an alternative sleeve that can reach currency or commodity ETFs.sec.gov
• Live since 2021, physically replicating its index rather than using swaps, in a standard 1940 Act ETF wrapper that pays quarterly.

Worth knowing

• GRNB Thinly traded next to core bond giants like BND, so spreads and order type matter more here.
• Green describes what the proceeds fund, not an issuer's whole business; the credit still sits with governments, supranationals and companies.
• The screen costs extra: plain aggregate rivals like BND and SPAB list expense ratios near 0.03%.

• MAMB Fee is 1.15% with no waiver, above the category median; index peers like BNDW (0.05%) and DFGP (0.22% net of a waiver through February 28, 2027) cost far less.
• It owns other ETFs, so those funds' own expenses sit underneath this fund's own fee.sec.gov
• Shares change hands lightly for the category, so spreads can be wider and limit orders earn their keep.

Full GRNB profile⁠

Full MAMB profile⁠