Capital buffer for other systemically important institutions (O-SII buffer)

Pursuant to a resolution adopted by the Governing Board of the Bank of Slovenia at its 546th meeting of 8 December 2015, the Bank of Slovenia introduced the macro-prudential measure capital buffer for other systemically important institutions (hereinafter: O-SIIs). The initial phase-in period for banks identified as O-SIIs to meet the capital requirements was set for 1 January 2019.

Pursuant to the Banking Act (the ZBan-2; Official Gazette of the Republic of Slovenia, No. 25/15 and 44/16 – ZRPPB, 77/16-ZCKR and 41/17) Bank of Slovenia at least once a year conducts the O-SII identification process and sets the capital buffers for the identified O-SIIs. The identification process predominately follows the EBA Guidelines, which is regulated by the Regulation on application of the Guidelines on the criteria to determine the conditions of application of Article 131(3) of Directive 2013/36/EU (CRD) in relation to the assessment of other systemically important institutions (O-SIIs). The Governing Board of the Bank of Slovenia confirmed the revised values of the systemic importance scores and corresponding buffer rates for O-SIIs at its 651st meeting of 20 October 2019.
In the identification process the Bank of Slovenia took full account of the mandatory indicators for the scoring provided in the EBA Guidelines, which are illustrated in the table below.

Table 1: Mandatory indicators of systemic importance of banks







Total assets


Importance (including substitutability / financial system infrastructure)


Value of domestic payment transactions

Private sector deposits from depositors in the EU

Private sector loans to recipients in the EU


Complexity / cross-border activity


Value of OTC derivatives (notional)

Cross-jurisdictional liabilities

Cross-jurisdictional claims




Intra-financial system liabilities

Intra-financial system assets

Debt securities outstanding


Source: EBA Guidelines.


The score was calculated in accordance with the guidance set out in point 8 of the EBA Guidelines:

(a) by dividing the indicator value of each individual relevant entity by the aggregate amount of the respective indicator values summed across all institutions in the Member State (the “denominators”);
(b) by multiplying the resulting percentages by 10,000 (to express the indicator scores in terms of basis points;
(c) by calculating the category score for each relevant entity by taking a simple average of the indicator scores in that category;
(d) by calculating the overall score for each relevant entity by taking a simple average of its four category scores.

In the O-SII identification process Bank of Slovenia closely follows the methodology outlined in the EBA Guidelines with the exception of paragraph 9, which allows macroprudential authorities to raise the threshold for O-SII identification up to 425 basis points as a maximum. Namely, in 2017 the Bank of Slovenia decided to raise the threshold for the identification of O-SIIs from 350 to 500 basis points and, consequently, to adjust the number and buffer floor for each bucket (Article 2 of the Regulation on the determination of the buffer for other systemically important institutions, Official Gazette of the Republic of Slovenia, No. 96/15, 68/17). The decision on the floor methodology was informed by the systemic relevance scores of the banks gained on the basis on the EBA methodology. Additionally, certain criteria were followed in designing the bucket sizes, floor buffer rates for each bucket and the implementation of the capital requirements (please see table below). These include, but are not limited to equal width of the buckets; stable O-SII status, cyclical effects of structural instruments, comparability of buffer rate across institutions of similar size within the EU in order to ensure level of playing field, highest buckets should not be populated in order to incentivize institutions not to increase their systematic importance.

Table 2: Capital buffer rate


Capital buffer

5400 -


4700 - 5399


4000 - 4699


3300 - 3999


2600 - 3299


1900 - 2599


1200 - 1899


  500 - 1199


Source: Regulation on the determination of the buffer for other systemically important institutions.

This year's number of identified O-SIIs was influenced by the merger of two O-SIIs (NKBM and Abanka). Given the new scores of systemic relevance in 2020, a higher buffer rate has been set for NKBM (0.50%), and a lower one for SID Banka (0.25%). The identified O-SIIs are expected to meet the capital requirement at the highest level of consolidation in Slovenia, through common equity Tier 1 capital.

Table 3: Scores in assessment of systemic importance and capital buffer rates


Systemic importance score
(EBA guidelines)

Capital buffer rate
 (as proportion of total risk exposure amount)

NLB d. d. 3266 1.00%
Nova KBM d. d. 1675 0.50%**
SID banka, d. d. 1089 0.25%*
SKB d. d. 602 0.25%
Unicredit banka Slovenija d. d. 581 0.25%
Banka Intesa Sanpaolo, d.d. 563 0.25%*

Note:  *Banks are expected to meet the requirement of 0.25% as of 1 January 2021.
**Nova KBM d.d. is expected to meet the requirement of 0.5% as of 1 January 2022.
Source: Bank of Slovenia.