HSBC 2010 Annual Report Download - page 259

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Overview Operating & Financial Review Governance Financial Statements Shareholder Information
The collective impairment allowance is determined after taking into account:
– historical loss experience in portfolios of similar credit risk characteristics (for example, by industry sector,
loan grade or product);
– the estimated period between impairment occurring and the loss being identified and evidenced by the
establishment of an appropriate allowance against the individual loan; and
– management’s experienced judgement as to whether current economic and credit conditions are such that
the actual level of inherent losses at the balance sheet date is likely to be greater or less than that suggested
by historical experience.
The period between a loss occurring and its identification is estimated by local management for each identified
portfolio.
Homogeneous groups of loans and advances
Statistical methods are used to determine impairment losses on a collective basis for homogeneous groups of
loans that are not considered individually significant, because individual loan assessment is impracticable.
Losses in these groups of loans are recorded on an individual basis when individual loans are written off, at
which point they are removed from the group. Two alternative methods are used to calculate allowances on a
collective basis:
− When appropriate empirical information is available, HSBC utilises roll rate methodology. This
methodology employs statistical analyses of historical data and experience of delinquency and default to
estimate the amount of loans that will eventually be written off as a result of the events occurring before the
balance sheet date which HSBC is not able to identify on an individual loan basis, and that can be reliably
estimated. Under this methodology, loans are grouped into ranges according to the number of days past due
and statistical analysis is used to estimate the likelihood that loans in each range will progress through the
various stages of delinquency, and ultimately prove irrecoverable. Current economic conditions are also
evaluated when calculating the appropriate level of allowance required to cover inherent loss. The estimated
loss is the difference between the present value of expected future cash flows, discounted at the original
effective interest rate of the portfolio, and the carrying amount of the portfolio. In certain highly developed
markets, sophisticated models also take into account behavioural and account management trends as
revealed in, for example, bankruptcy and rescheduling statistics.
− When the portfolio size is small or when information is insufficient or not reliable enough to adopt a roll rate
methodology, HSBC adopts a basic formulaic approach based on historical loss rate experience.
In normal circumstances, historical experience provides the most objective and relevant information from which
to assess inherent loss within each portfolio, though sometimes it provides less relevant information about the
inherent loss in a given portfolio at the balance sheet date, for example, when there have been changes in
economic, regulatory or behavioural conditions which result in the most recent trends in portfolio risk factors
being not fully reflected in the statistical models. In these circumstances, the risk factors are taken into account
by adjusting the impairment allowances derived solely from historical loss experience.
These additional portfolio risk factors may include recent loan portfolio growth and product mix, unemployment
rates, bankruptcy trends, geographic concentrations, loan product features (such as the ability of borrowers to
repay adjustable-rate loans where reset interest rates give rise to increases in interest charges), economic
conditions such as national and local trends in housing markets and interest rates, portfolio seasoning, account
management policies and practices, current levels of write-offs, changes in laws and regulations and other items
which can affect customer payment patterns on outstanding loans, such as natural disasters. These risk factors,
where relevant, are taken into account when calculating the appropriate level of impairment allowances by
adjusting the impairment allowances derived solely from historical loss experience.
Roll rates, loss rates and the expected timing of future recoveries are regularly benchmarked against actual
outcomes to ensure they remain appropriate.
Write-off of loans and advances
Loans (and the related impairment allowance accounts) are normally written off, either partially or in full, when
there is no realistic prospect of recovery. Where loans are secured, this is generally after receipt of any proceeds