San Francisco-based Barclays Global Investors last week rolled out 10 iShares Dow Jones Subsector Index Funds, raising the number of exchange traded funds in the iShares family to 111.

"Due to the Dow Jones sector series being market cap weighted, many investors have asked us for a way to provide subsector exposure in situations where the broader sector is dominated by large cap names," said Lee Kranefuss, chief executive of BGI's intermediary and ETF business, in a news release.

The new offerings are:

iShares Dow Jones U.S. Oil & Gas Exploration Production Index Fund ("IEO")

iShares Dow Jones U.S. Oil Equipment and Services Index Fund ("IEZ")

iShares Dow Jones U.S. Pharmaceuticals Index Fund ("IHE")

iShares Dow Jones U.S. Healthcare Providers Index Fund ("IHF")

iShares Dow Jones U.S. Medical Devices Index Fund ("IHI")

iShares Dow Jones U.S. Broker-Dealers Index Fund ("IAI")

iShares Dow Jones U.S. Insurance Index Fund ("IAK")

iShares Dow Jones U.S. Regional Banks Index Fund ("IAT")

iShares Dow Jones U.S. Aerospace & Defense Index Fund ("ITA")

iShares Dow Jones U.S. Home Construction Index Fund ("ITB")

The funds, which began trading Friday on the New York Stock Exchange, carry an annual expense ratio of 0.48 percent.  

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