Deutsche Bank has once again expanded its lineup of leveraged and inverse exchange-traded notes covering portions of the commodities markets with the launch of two product suites for base metals and crude oil on the NYSE. This time, however, the ETNs are being co-launched with PowerShares in what seems to be a strategic branding move.

The new funds include the following:

• PowerShares DB Base Metals Double Short ETN: (NYSE Arca: BOM)
• PowerShares DB Base Metals Double Long ETN: (NYSE Arca: BDD)
• PowerShares DB Base Metals Short ETN: (NYSE Arca: BOS)
• PowerShares DB Base Metals Long ETN: (NYSE Arca: BDG)
• PowerShares DB Crude Oil Double Short ETN: (NYSE Arca: DTO)
• PowerShares DB Crude Oil Short ETN: (NYSE Arca: SZO)
• PowerShares DB Crude Oil Double Long ETN: (NYSE Arca: DXO)
• PowerShares DB Crude Oil Long ETN: (NYSE Arca: OLO)

The long and double long ETNs seek to capture 100% and 200% of their underlying indexes' monthly performance, while the short and double short ETNs promise -100% and -200% of their underlying indexes' monthly performance.

The base metals ETNs are linked to the Deutsche Bank Liquid Commodity Index - Optimum Yield Industrial Metals, which tracks aluminum, copper and zinc futures contracts. The oil contracts, however, are linked to two different indexes. SZO and DTO, the short notes, are tied to the Deutsche Bank Liquid Commodity Index - Light Crude; while OLO and DXO, the long notes, are tied to the Deutsche Bank Liquid Commodity Index - Optimum Yield Crude Oil. The "Optimum Yield" index uses a different roll methodology that optimizes returns when the oil market is in backwardation and minimizes losses when the market is in contango.

All of the new ETNs charge an expense ratio of 0.75%.

PowerShares and Deutsche Bank recently renewed their co-branding agreement, thus the new ETNs are marketed under the name "PowerShares DB." The existing Deutsche Bank ETNs also will be rebranded accordingly. The change makes sense as Deutsche Bank had three groups of exchange-traded products: its commodity ETNs marketed under its own name, a group of mainly currency ETNs marketed through the ELEMENTS ETN platform and the PowerShares DB commodity exchange-traded funds. By co-branding the commodity ETNs, Deutsche Bank leverages the strength of the PowerShares brand, which is well-known in the exchange-traded products area and also links its newer ETNs to the well-established PowerShares DB family of commodity ETFs.

Read the prospectus for the base metals ETNs here.

Read the prospectus for the crude oil ETNs here.