A.M. Best Affirms Ratings of Arch Reinsurance Ltd. and Its Operating Affiliates

  A.M. Best Affirms Ratings of Arch Reinsurance Ltd. and Its Operating

Business Wire

OLDWICK, N.J. -- January 24, 2013

A.M. Best Co. has affirmed the financial strength rating (FSR) of A+
(Superior) and the issuer credit ratings (ICR) of “aa-” of Arch Reinsurance
Ltd. (Arch) (Bermuda) and its strategic affiliates. A.M. Best also has
assigned an FSR of A+ (Superior) and an ICR of “aa-” to Arch Insurance Canada
Ltd. (Canada), which was converted from a branch company to an operating
subsidiary in late 2012.

Concurrently, A.M. Best has affirmed the ICR of “bbb+” of Arch Capital Group
(US) Inc. (Delaware), as well as the ICR of “a-” and all debt ratings of the
ultimate holding company, Arch Capital Group Ltd (Bermuda) [NASDAQ: ACGL]. The
outlook for all ratings is stable. (See below for a detailed listing of the
companies and ratings.)

The affirmations reflect Arch’s continued superior operating performance
amidst challenging market conditions, consistently excellent capitalization
and demonstrated enterprise risk management. Arch maintains a very strong
underwriting culture and focuses on actively managing the cycle by being
adaptive to varied market conditions. As industry investment yields continue
to be at record lows, underwriting profitability is vital. The company is
capable of writing a broad range of property/casualty insurance and
reinsurance on a worldwide basis and focuses on specialty lines.

Overall operating results have been strong since Arch’s inception and certain
metrics have exceeded most peers in the sector. Typically, Arch has had a
smaller share of major industry losses, as was the case in 2011 when numerous
global catastrophes struck. Recently, with Hurricane Sandy inflicting
approximately $25 billion of insured losses, Arch’s current loss estimates are
in line with its expected market share and very manageable. As a result, Arch
has historically reported stable and consistent financial results with lower
levels of volatility than many of its peers. Furthermore, Arch has a prudent
investment portfolio and conservative reserving philosophy, which helps
maintain a strong balance sheet.

Partially offsetting these positive rating attributes are the current soft
market conditions through which Arch, as well as all industry participants,
must navigate.

For Arch, factors that could result in negative rating pressure include
unfavorable operating profitability trends, outsized catastrophe or investment
losses relative to peers, significant adverse loss reserve development and/or
a material decline in risk-adjusted capital. However, factors that could lead
to a positive outlook or further rating upgrades would be the continuation of
long-term, consistently strong operating profitability relative to its peers
and maintenance of strong risk-adjusted capital levels.

The FSR of A+ (Superior) and the ICRs of “aa-” have been affirmed for Arch
Reinsurance Ltd. and its following affiliates:

  *Arch Reinsurance Company
  *Arch Insurance Company
  *Arch Specialty Insurance Company
  *Arch Excess & Surplus Insurance Company
  *Arch Insurance Company (Europe) Ltd

The following debt ratings have been affirmed:

Arch Capital Group Ltd—

-- “a-” on $300 million 7.35% senior unsecured notes, due 2034

-- “bbb” on $325 million 6.75% non-cumulative preferred shares, Series C

The following indicative ratings have been affirmed for debt securities
available under the existing shelf registration:

Arch Capital Group Ltd—

-- “a-” on senior debt

-- “bbb+” on subordinated debt

-- “bbb” on preferred stock

Arch Capital Group (U.S.) Inc. (guaranteed by Arch Capital Group Ltd)—

-- “a-” on senior debt

-- “bbb+” on subordinated debt

-- “bbb” on preferred stock

The methodology used in determining these ratings is Best’s Credit Rating
Methodology, which provides a comprehensive explanation of A.M. Best’s rating
process and contains the different rating criteria employed in the rating
process. Key criteria utilized include: “Risk Management and the Rating
Process for Insurance Companies”; “Understanding BCAR for Property/Casualty
Insurers”; and “Rating Members of Insurance Groups.” Best’s Credit Rating
Methodology can be found at www.ambest.com/ratings/methodology.

Founded in 1899, A.M. Best Company is the world's oldest and most
authoritative insurance rating and information source. For more information,
visit www.ambest.com.

       Copyright © 2013 by A.M. Best Company, Inc. ALL RIGHTS RESERVED.


A.M. Best Co.
Greg Reisner
Managing Senior Financial Analyst
(908) 439-2200, ext. 5224
John Andre
Group Vice President
(908) 439-2200, ext. 5619
Rachelle Morrow
Senior Manager, Public Relations
(908) 439-2200, ext. 5378
Jim Peavy
Assistant Vice President, Public Relations
(908) 439-2200, ext. 5644
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