Another two derivatives-based commodities ETFs from Jefferies are making their way into the market.

The Jefferies TR/J CRB Commodity Index ETF and the Jefferies Commodity Real Return ETF, currently in registration with the Securities and Exchange Commission, will be listed on the NYSE Arca under the proposed tickers of CRB and RRET, respectively.

By design, the funds will give investors a long-only, broad diversification into the commodities segment by investing in futures contracts for 19 physical commodities that include aluminum, cocoa, coffee, copper, corn, cotton, crude oil, gold, heating oil, lean hogs, live cattle, natural gas, nickel, orange juice, silver, soybeans, sugar, gasoline and wheat.

These new broad-based funds will join Jefferies' growing list of commodities ETFs linked to CRB strategies. The firm's lineup already includes equities-based vehicles that offer investors ways to tap into global commodities (NYSEArca: CRBQ), an agriculture-only play (NYSEArca: CRBA), industrial metals (NYSEArca: CRBI) as well as its most recent launch, the Jefferies TR/J CRB Wildcatters Exploration & Production Equity ETF (NYSEArca: WCAT).

CRB's underlying index tracks the prices of near-month rolling futures positions in 19 commodities. RRET will have a similar strategy, but it will invest in futures contracts of commodities included in the CRB 3-Month Forward Index, which tracks closing levels of futures positions that would comprise the CRB index in three months.

While derivatives-based plays on the commodities ETF space is no novelty, these offerings are relatively unique in construction for they also have an element of fixed-income exposure that will seek to generate interest income as well as serve as a tool to protect against inflation.

Their benchmarks use a four-tiered approach to allocate among the commodities included in the basket: petroleum sector, highly liquid commodities, liquid commodities and diversifying commodities. Within each tier, the commodities all carry equal weighting, with the exception of the petroleum mix, where crude oil significantly outweighs the other components. Each index is rebalanced monthly.

Both funds would be subject to position limits imposed by the CFTC on various commodities markets, which might affect their ability to issue shares.

The management fee for each fund is pegged at 75 basis points.

You can read the prospectus here.