Press Release
April 7, 2003
Strengthening Weather Derivatives Business by Global Alliance

Mitsui Sumitomo Insurance Co., Ltd. (President Hiroyuki Uemura, hereinafter "MSI") is pleased to announce that MSI has created a strategic alliance in the weather derivatives business with GuaranteedWeather Holding Ltd.(CEO Brian O'Hearne, hereinafter "GW" headquartered in Bermuda with management services from USA), and launched a globally evolutive operation since April this year.
MSI sees that this alliance enables the company to not only further enhance the profitability of its weather derivatives business but also offer its customers a wide range of weather risk management products satisfying their various needs in Japan.

1. Alliance Structure
(1) Conceptual Drawing

(2) Alliance Business Flow
(1) Marketing and Underwriting activities for weather derivatives are internationally demarcated between MSI for Japanese/Asian market, GW for American market and Hannover Reinsurance Company for European market.
(2) A The risks assumed by them will then be converged into a global weather pool managed by GW to create a globally diversified portfolio.
(3) The portfolio will be reallocated to each alliance partner.

2. Advantages out of the Alliance
(1) MSI's weather derivatives premiums offered to its customers can be stabilized and even lowered, as compared with the cases of focusing its risk-taking simply on Japanese risks, because of expected exchange and diversification of risks among the alliance partners.
(2) Backed by an international integration of the alliance partners' risk-taking capacity, MSI
would be able to cope with larger risks so that such demands as from Japanese Power
and Gas sectors may be satisfied.
(3) Through sharing the techniques behind product development and risk management among the alliance partners, MSI can offer weather-related derivatives products which optimize sophisticated know-how in the international marketplace.

3. Background of the Alliance
(1) In the weather derivatives business, MSI does always pride itself on the highest performance as the frontier since the first-ever deal in June 1999 as well as the first launch of sales through a regional bank's intermediary it implemented in Japan. The recent completion of its integrated weather derivatives-specific systems for a comprehensive use including weather data processing, analysis and evaluation of risks and transactional administration also indicates the fact that it has led this market from the aspects of a high-tech know-how and operational skills.
(2) On the other hand, GW is a weather derivatives-purpose company incorporated by Ramsey Quantitative Systems Inc.(CEO Neil Ramsey, based in Louisville, Kentucky), a US investment management company.
GW, which took over the employees, IT& the systems, the brand, the mode of operation and so on from Aquila which used to be one of the world top players in the weather derivatives arena, has entered the US weather derivatives market primarily as a major market maker since this April.
(3) MSI's alliance with GW has been decided because expectations of a global business evolvement, weather risk management methodology etc. were found in good agreement with each other. This alliance is believed to further strengthen MSI's competitiveness on a global basis.
(4) The size of the global weather derivatives market today is said to amount approximately to $ 10 billions on aggregate notional amounts basis. But the market has rather faced a sluggish growth due to the reduction or withdrawal of the business by larger US energy merchants who were the major players in the weather derivatives. Entrance to the weather derivatives market and the alliance with MSI by GW are expected to bring additional expansion and activation to the global weather derivatives market.

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