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Moody's and S&P alphanumeric ratings conversion into numeric values

Moody's and S&P alphanumeric ratings conversion into numeric values

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Using historical data on sovereign and individual borrowers, the authors assess the potential impact on non-high-income countries of linking capital asset requirements for banks to private sector ratings, as the Basel committee has proposed. They show that linking bank's capital asset requirements to external ratings would have undesirable effects...

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... what follows, we conventionally convert the equivalent Moody's and S&P alphanumeric rating scale into the numeric scale as reported in Table 1. ...

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... The main one is that rating agencies, both Russian and global, are usually slow in updating their grades, and banks with an investment grade sometimes lose their license. Ferri et al. [18] found that credit ratings alone are not sufficient to reliably predict bank failures. Karminsky and Kostrov [19] produced similar results for the Russian banking sector. ...
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... There is empirical evidence documenting the impact of the institutional environment on both firm entry (Klapper et al., 2004, andLove, 2010) and firm growth (Batra andStone, 2008, andWoodruff, 2003). Additionally, especially in developing countries, bank and corporate ratings depend on both the government's creditworthiness and on the general business environment, making debt contracting more expensive in countries with poor business environment ratings (Majnoni et al., 1999, andNguyen andKnyphausen-Aufseß, 2014). Governance indicators on corruption, government effectiveness, and regulatory quality matter for firm performance, as measured by employment, investment and sales growth (Batra and Stone, 2008). ...
... This may have severe impact on the macro-economic stability. For example, Ferri et al. (2000) show that during the East Asian currency crisis of 1997-98, following Moody's downgradation of sovereign ratings for Indonesia, Korea and Thailand, the corporate ratings were also downgraded sharply in these countries, leading to a sharp fall in the international capital flows in the region. Interestingly, even when the sovereign ratings of Korea and Thailand were upgraded in 1999 following the macro-economic recovery, corporate ratings continued to remain 'speculative grade'. ...
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... 26. On this issue, s ee Ferri, Liu, and Majnoni (2000). 27. ...
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... Moreover, they aggravated the East Asian crisis by downgrading East Asian crisis countries more than the worsening in these countries' economic fundamentals would have justified. In a companion paper Ferri et al. (2000) show that, differently from corporate ratings, banks ratings tend to be strictly dependent on sovereign ratings and therefore are bound to share the same problems. No study we know of has, however, looked at the informational content of credit ratings of individual banks and has compared them with other indicators of financial fragility. ...
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... Indeed, this fear has some empirical basis. In their study using historical data on sovereign and individual borrowers, Ferri et al. (2000) found that: ...
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