Default prediction of Spanish companies. A logistic analysis
Abstract
In the field of credit risk management, the calculation of the probability of default of companies plays a key role. For that reason, bankruptcy prediction of companies has generated extensive research in the past decades. This paper applies one of the most popular techniques, the logistic regression. This technique is extensively used both by professionals and academics and is employed in many studies as a benchmark. Here we will apply it on a vast data base of the Spanish companies and a statistical analysis of the robustness of the model will be undertaken, with very satisfactory results.
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ISSN 1822-8011 (p in )
ISSN 1822-8038 (online)
INTELEKTINĖ EKONOMIKA
INTELLECTUAL ECONOMICS
2013, Vol. 7, No. 3(17), p. 333–343
DEFAULT PREDICTION OF SPANISH COMPANIES.
A LOGISTIC ANALYSIS
Concepción BARTUAL
Uni e si a Poli ècnica de València
E-mail: conba [email protected] .es
Fe nando GARCIA
Uni e si a Poli ècnica de València
E-mail: e ga [email protected] .es
F ancisco GUIJARRO
Uni e si a Poli ècnica de València
E-mail: [email protected] .es.
Ismael MOYA
Uni e si a Poli ècnica de València
E-mail: [email protected] .es
doi:10.13165/IE-13-7-3-05
Abs ac . In he ield o c edi isk managemen , he calcula ion o he p obabili y o
de aul o companies plays a key ole. Fo ha eason, bank up cy p edic ion o companies has
gene a ed ex ensi e esea ch in he pas decades. This pape applies one o he mos popula
echniques, he logis ic eg ession. This echnique is ex ensi ely used bo h by p o essionals
and academics and is employed in many s udies as a benchma k. He e we will apply i on
a as da a base o he Spanish companies and a s a is ical analysis o he obus ness o he
model will be unde aken, wi h e y sa is ac o y esul s.
JEL classi ica ion: G32, G33.
Keywo ds: Logi model, isk managemen , bank up cy p edic ion.
Reikšminiai žodžiai: logis inis modelis, izikos aldymas, bank o o p ognoza imas.
In oduc ion
C edi isk analysis is one o he mos impo an asks o be unde aken by inan-
cial ins i u ions. The lack o a co ec me hodology o calcula e he p obabili y o de aul
o he clien s may lead o high losses in he banks, c ea e sys emic isk, and a ec he
whole economy o a coun y. An example o such an e en can be seen in he Spanish
334 Concepción Ba ual, Fe nando Ga Cía, F ancisco Guija o, F ancisco Guija o
case, whe e he economy is su e ing because o he high de aul a es o he c edi s
and he huge losses o he c edi ins i u ions om 2010. I has become ob ious ha he
c edi isk managemen unde aken by he Spanish banks in he p e ious decade has
been inadequa e.
Fo ecas ing bank up cy isk o en e p ises is one o he i s uses gi en o inancial
accoun ing in o ma ion. In ac , he s udy o he i ms’ p obabili y o de aul and he
de elopmen o c edi a ings had al eady gained ele ance in 1909, when he US a ing
agencies s a ed analysing he inancial si ua ion o he ailway companies. Ne e heless,
he o igin o he bank up cy p edic ion models lies in he 1960’s decade. Bea e (1966)
showed using 30 accoun ing a ios ha he alue o some o hose a ios a ied signi i-
can ly be ween dis essed and non-dis essed companies. Fu he mo e, Al man (1968)
applied disc iminan analysis on se e al inancial a ios in a mul i a ia e con ex and
gene a ed a model o p edic business ailu e. Tha was he s a ing poin o a ield o
esea ch ha has become inc easingly impo an , whe e new, mo e accu a e, p edic ion
models wi h new me hodologies and bigge da a bases a e s ill de eloped.
Many echniques ha e been used a e he s udies by Bea e (1966) and Al man
(1968) o p edic co po a e inancial dis ess employing he economic and inancial in-
o ma ion om he accoun ing sys em.
Following Ra i Kuma and Ra i (2007), he me hods used o analyse co po a e c e-
di isk can be di ided in o wo big g oups: s a is ical me hods and a i icial in elligence
echniques. The quan i y o s udies unde aken in his ield is eno mous, which is a p oo
o how impo an i ac ually is in he p esen imes o manage c edi isk app op ia ely,
and he in e es showed by academics and p ac i ione s.
Wi hou being exhaus i e, we can e e o he ollowing me hodologies and ech-
niques: some o he mos widesp ead s a is ical me hods a e disc iminan analysis (Yim
and Mi chell, 2004); he p obi model (Ginoglou and Ago as os, 2002) and he logis ic
eg ession (Ohlson, 1980), which is he one o be applied in his s udy. The e o e, we
will commen on i la e . Wi hin he a i icial in elligence echniques we can coun neu-
onal ne wo ks (Ra i and P amodh, 2008), decision ees (Ko ol, 2013), ough se s (Tay
and Shen, 2002; McKee, 2003), da a en elopmen analyses (Cielen e al., 2004), suppo
ec o machines (Kim and Sohn, 2010) and gene ic algo i hms (E emadi e al., 2009),
and goal p og amming (Ga cía e al. 2013) a e he mos common ones and some ecen
wo ks.
Al hough many new echniques ha e been applied in he las yea s o p edic com-
panies’ dis ess, he logi model is s ill widely accep ed among esea che s and p ac i-
ione s. Some o he mos p es igious a ing agencies use logi models o gene a e hei
company classi ica ions. And many ecen academic esea ches apply he logis ic eg es-
sion o p edic co po a e de aul (Joo-Ha and Taehong, 2000; Kola i e al., 2002; Lin
and Piesse, 2004; Jones and Henshe , 2004; Canbas e al., 2005; Chen and Zhang, 2006;
Al man and Saba o, 2007; Pang-Tien e al. 2008; Psillaki e al., 2010; He nández and
Wilson, 2013; Zaghdoudi, 2013) o as a benchma k o compa e he new c edi isk p e-
dic ion me hods (Min and Jeong, 2009; Kim and Sohn, 2010; Su and Huang, 2010; Chen,
2011; Li e al., 2011; Chaudhu i, 2013). One o he bigges challenges aced by esea che s
when applying he logis ic eg ession is o bene i om a la ge and comp ehensi e da a
335
De aul P edic ion o Spanish Companies. a Logis ic Analysis
base wi h high quali y accoun ing in o ma ion ha gua an ees o he obus ness o he
model ob ained and he accu acy o he p edic ions (Ba ual e al., 2012a).
Howe e , one mus be awa e o ce ain obus ness p oblems ha may a ise when
using logi , especially in ela ion o he composi ion o he sample used o es ima e he
model. Resea che s should pay close a en ion o h ee ac o s: he choice o a iables
o be used in he model, he in luence o he sample on he model esul s and he cu o
poin .Wha e e he a iables used, he logi model inally ob ained will depend on he
sample on which he model is based. This means ha only some o he p eselec ed a ia-
bles will ac ually be used in he model, since bo h he selec ion and he weigh ing o he
a iables will depend on he sample o companies.
Fu he mo e, wha e e he chosen cu o poin , e en hough i will no modi y
nei he he selec ed a iables no hei weigh s, his cu o poin will a ec he disc imi-
na ion p ocess and hus also he pe cen age o co ec and inco ec p edic ions.
The aim o he p esen s udy is o ob ain a model o p edic co po a e de aul o he
Spanish manu ac u ing companies applying he logis ic eg ession model. The goal is o
help sol ing an impo an issue in he Spanish economy, imme sed as i is in a p o ound
economic and inancial c isis. No only inancial ins i u ions, bu also clien s, supplie s,
he public adminis a ion and o he economic agen s a e in he need o know he p o-
babili y o de aul o he companies wi h which hey in e ac . In o de o cons uc he
model, a da abase has been c ea ed wi h he accoun ing in o ma ion om mo e han
2,000 companies o he yea 2010. A ha yea , he e ec s o he inancial c isis eme ged
and many i ms we e nega i ely a ec ed. I is a la ge da abase, much bigge han he
ones used in simila wo ks, which makes i possible o ob ain a obus model capable o
accu a e p edic ions.
The emainde o he pape is s uc u ed as ollows. Sec ion 2 desc ibes he da a-
base and he selec ed explana o y a iables. Sec ion 3 p esen s he main esul s and he
sensi i i y analyses. Finally, sec ion 4 is de o ed o he conclusions.
1. Desc ip ion o he Da abase and he Selec ed Explana o y Va iables
In his sec ion, he da abase employed is p esen ed. The selec ion o he g oup o
companies o analyse and he quali y and e aci y o he inancial in o ma ion employed
a e c i ical s eps owa ds ob aining a obus model. Fu he mo e, in o de o implemen
he sensibili y analysis i is necessa y o coun wi h a high numbe o da a. Finally, i is
impo an o include in he da abase an ele a e amoun o de aul ed companies. In ac ,
i he numbe o dis essed companies in he subsamples we e oo low, a solu ion s a ing
ha all companies a e sol en would be e y di icul o bea .
A e aking all o hese ac o s in o conside a ion, he da abase SABI-In o ma was
consul ed. This da abase has go accoun ing and inancial in o ma ion o almos all non-
inancial i ms in Spain, supplied by he companies hemsel es. In o de o gua an ee he
e aci y and accu acy o he in o ma ion and o wo k wi h a homogeneous sample o
companies, only i ms wi h accoun ing in o ma ion o 2010 we e conside ed. This yea
336 Concepción Ba ual, Fe nando Ga Cía, F ancisco Guija o, F ancisco Guija o
was chosen because i was he i s one in which he Spanish economy el he impac o
he inancial c isis, inc easing he numbe o de aul ed companies. I is no ewo hy o
men ion ha in he p eceden yea s he bank up i ms wi hin he selec ed sample we e
almos inexis en , making any co po a e dis ess p edic ion analysis i ually impossible.
Ou o he 2,783 selec ed companies, 736 we e iden i ied as insol en (26.5% o he
sample). A i m is classi ied as being in inancial dis ess when i s ne wo h is nega i e
o has o mally de aul ed on i s obliga ions, ha is, when i s legal s a us is de ined as
suspended o in liquida ion. Among he 736 companies ha ailed, 251 had a nega i e
equi y alue and he emaining 485 companies had o mally de aul ed.
The a iables employed in he sol ency analysis we e ob ained om he balance
shee s and he income s a emen s o he companies: o al asse s, cu en asse s, cash,
equi y, cu en liabili ies, o al sales, cos o aw ma e ials, labou cos s, ope a ing in-
come, inancial income and p e- ax p o i s. Using hese 11 accoun ing inpu s, se e al
inancial a ios we e calcula ed:
1. ET: Equi y / To al asse s
2. CL: Cash / Cu en liabili ies
3. LS: Labou cos s / Sales
4. OS: Ope a ing income / Sales
5. OT: Ope a ing income / To al asse s
Al oge he , 16 explana o y a iables we e used o ob ain he co po a e de aul p e-
dic ion model. The selec ion o he a iables was unde aken ollowing Ba ual e al., 2012 b.
Summa y s a is ics o explana o y inancial and a io a iables can be ound in Table 1.
Table 1. Desc ip i e s a is ics
Va iable Minimum Maximum Mean Median S anda d de ia ion
To al asse s 11 3,065,534 6,339.8 687 76,298.0
Cu en asse s 2 1,749,916 3,205.0 391 36,195.9
Cash 0 33,991 183.9 28 1,021.2
Equi y -26,264 873,721 2,186.4 150 24,734.9
Cu en liabili ies 1 392,810 2,095.2 288 13,422.2
To al sales 5 1,476,753 4,922.0 640 40,729.6
Cos o aw ma e ials 0 873,897 2,954.2 286 25,195.9
Labo cos s 0 125,211 814.2 210 4,122.3
Ope a ing income -26,019 285,172 153.1 6 6,394.7
Financial income -42,043 22,769 -43.3 -6 1,033.8
P e- ax p o i s -18,244 873,897 2,954.2 286 5,161.0
ET -16.657 0.998 0.231 0.266 0.659
CL 0.000 105.000 0.511 0.087 3.020
LS 0.000 15.571 0.404 0.331 0.641
OS -37.000 33.862 -0.131 0.013 1.323
OT -39.363 0.956 -0.077 0.013 0.807
No e: Balance shee and income accoun s a e exp essed in housands o eu os.
Sou ce: The au ho s.
337
De aul P edic ion o Spanish Companies. a Logis ic Analysis
The p oposed logi model makes i possible o es ima e he likelihood o a i m o
belong o he g oup o sol en companies (i he ob ained alue is 1) o o he g oup o
insol en companies (i he alue is 0) using he 16 independen a iables in oduced
abo e. In o de o iden i y he mos signi ican and obus model, he s epwise me hod
has been applied and op imised by he Akaike index (AIC). The selec ed model is p e-
sen ed in Table 2.
Table 2. Resul o he s epwise logis ic eg ession
Es ima e S d. E o z alue P (>|z|)
(In e cep ) 3.837e-01 8.698e-02 4.411 1.03e-05 ***
Cu en asse s -1.842e-04 5.047e-05 -3.649 0.000263 ***
Equi y 1.577e-04 5.179e-05 3.046 0.002320 **
Cu en liabili ies 1.764e-04 4.920e-05 3.585 0.000337 ***
Financial income 1.648e-03 4.108e-04 4.011 6.06e-05 ***
P e- ax p o i s 8.911e-04 1.832e-04 4.864 1.15e-06 ***
Equi y / To al asse s 5.281e+00 3.222e-01 16.391 < 2e-16 ***
Cash / Cu en liabili ies 8.275e-01 2.184e-01 3.790 0.000151 ***
Ope a ing income / To al asse s 5.910e+00 5.226e-01 11.309 < 2e-16 ***
Signi . codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
(Dispe sion pa ame e o binomial amily aken o be 1)
Null de iance: 3219.4 on 2782 deg ees o eedom
Residual de iance: 1632.7 on 2774 deg ees o eedom
AIC: 1650.7
Numbe o Fishe Sco ing i e a ions: 9
Sou ce: The au ho s.
The p ocess has con e ged a e 9 i e a ions and he coe icien s o ollowing expla-
na o y a iables a e signi ican wi h a le el o con idence o 99%: Cu en asse s, equi y,
cu en liabili ies, inancial esul , p e- ax p o i s, equi y / o al asse s, cash / cu en liabi-
li ies, y ope a ing income / o al asse s. The alue ob ained by he Akaike index is 1,650.7.
I is possible o d aw some in e es ing conclusions by simply looking a he sign o
he coe icien s. The coe icien wi h he highes z- alue is he one o he a io equi y /
o al asse s, wi h a posi i e sign. This is due o he impo ance o ha ing an ele a e equi y
alue compa ed wi h he liabili ies, ha is, ha ing a educed inancial le e age, in o de
o a oid bank up cy. The second coe icien wi h he highes z- alue, ha ing a posi i e
sign as well, is he a io ope a ing income / o al asse s. This unde lines he necessi y o
ha ing high bene i s compa ed wi h he size o he i m o gua an ee he su i al o any
company. The a io cash / cu en liabili ies is ema kable as well. I s posi i e sign shows
ha i is impe a i e o he companies o ha e enough cash o pay he money back o
c edi o s and se le he deb s. I his condi ion is no me , he company will be h ea ened
wi h insol ency. The emaining a iables ha e he coe icien s ha sha e a simila econo-
mic in e p e a ion as he a iables commen ed abo e.
When he model is applied on he o al da abase, he esul s shown on Table 3
a e ob ained. Ou o he 738 de aul ed co po a ions, he model co ec ly p edic s he
338 Concepción Ba ual, Fe nando Ga Cía, F ancisco Guija o, F ancisco Guija o
si ua ion o 573 (77.6%). The es (22.4%) is inco ec ly assigned o he g oup o sol en
companies. In he case o he sol en companies, ou o he 2,045 i ms, 1,880 a e co -
ec ly de ined as sol en (91.9%), whe eas only 165 (8.1%) a e w ongly p edic ed o be
in bank up cy.
I he o al numbe o companies in he sample is o be conside ed ega dless hei
sol ency / insol ency s a e, he model can co ec ly assess he c edi isk in 88.1% o he
cases. A naï e model would p edic ha all he i ms a e sol en 1, ob aining a success a e
o 73.5%; equal o he pe cen age o sol en i ms in he sample. The e o e we can con-
i m ha ou model bea s by almos 15% he esul s ob ained by he naï e model. This
pe o mance o ou model can be conside ed as a good esul .
Table 3. Sol ency s a e p edic ion applying he logis ic eg ession model
Obse ed sol ency P edic ed sol ency
0 1 Row To al
0
573 165 738
727.386 262.499
0.776 0.224 0.265
0.776 0.081
0.206 0.059
1
165 1880 2045
262.499 94.731
0.081 0.919 0.735
0.224 0.919
0.059 0.676
Column To al 738 2045 2783
0.265 0.735
Sou ce: The au ho s.
2. Resul s and Sensi i i y Analyses
The esul s o e ed in he p e ious sec ion clea ly indica e he kind o accoun ing
a iables ha can be included in a model o he p edic ion o co po a e insol ency in
Spain. They also show he success a e o he model o each o he g oups in o which
he sample was di ided: sol en and insol en i ms. The a e age success a e is 88.1%.
Ne e heless, he analysis migh be biased as he same sample has been employed o he
es ima ion o he model and o he p edic ion o he dependen a iable.
In o de o a oid his kind o bias, he comple e simple has been di ided in o wo
subsamples, he i s one including 80% o he companies and he second one he emai-
ning 20%. The i s , bigge subsample has been employed as aining se o es ima e he
1 A nai e model conside s all he i ms o be sol en . So, i he e a e 90% o sol en i ms in he
sample, he naï e model would make co ec p edic ions in 90% o he cases. Bu all insol en
i ms would be w ongly assigned o he g oup o sol en companies.
339
De aul P edic ion o Spanish Companies. a Logis ic Analysis
p edic ion model. The second sample is he es se . The model ob ained using he big
subsample is applied on he es se and he a e o success is calcula ed.
Fu he mo e, his p ocess has been simula ed 1,000 imes by andomly selec ing
he companies o be assigned o he aining se and o he es se . Doing his, he model
ob ained in each simula ion is sligh ly di e en , and so was he a e o success.
Figu e 1 ep esen s he his og am o he a iable “success a e”. This a iable shows
he pe cen age o companies belonging o he se es o which hei sol ency / insol en-
cy es a e was co ec ly p edic ed. We can obse e ha he dis ibu ion o his a iable is
simila o he no mal dis ibu ion, wi h a mean alue o 87.96% and a s anda d de ia-
ion o 0.01479. Clea ly, he success a e ob ained o he comple e sample o companies
(88.1%) can be conside ed o be wi hin he ange ob ained o he mean success a e wi h
a con idence le el o 99%.
In conclusion, once he simula ion p ocess is unde aken, i becomes ob ious ha
he logi model is a obus me hodology o p edic co po a e de aul and ha a high
success a e migh be expec ed (88.1%) o he case o he Spanish manu ac u ing com-
panies when using he s anda d accoun ing a iables.
Figu e 1. His og am o he a iable “success a e”
Sou ce: The au ho s.
Conclusion
The p esen wo k shows he applica ion o a mul i a ia e s a is ical model, he logi
model, o p edic co po a e dis ess. As p edic i e a iables, commonly-used accoun-
ing in o ma ion has been used om a da abase including 2,783 Spanish manu ac u ing
i ms.
340 Concepción Ba ual, Fe nando Ga Cía, F ancisco Guija o, F ancisco Guija o
In ou sample, 73.5% o he i ms a e sol en , while 26.5% ha e been de ined as
de aul ed. The logi model ob ained combines in o ma ion ob ained om he balance
shee and om he income s a emen o he companies, which has been used in o de o
calcula e se e al economic and inancial a ios. When he model is applied on he com-
ple e sample, we ob ain a co ec p edic ion o he sol ency/insol ency o he companies
in 88.1% o he cases. The e o e, we can s a e ha he logi model bea s he esul ha
would be ob ained by a naï e model, which would be a success a e o only 73.5%.
Wi h he aim o a oiding he bias ha can appea when he same simple is used
o gene a e he model and o calcula e he a e o success, 1,000 simula ions ha e been
calcula ed. In he simula ions, 80% o he companies o he sample we e andomly as-
signed o he aining se and he emaining 20% o he companies o he es se . The
esul s make e iden ha he logi model is a obus me hodology o explain and p edic
co po a e bank up cy.
Fo u u e lines o esea ch we can p opose he use o o he echniques om he
a i icial in elligence ield o be compa ed wi h he logi model, which is he adi ional
benchma k o c edi isk e alua ion. Such echniques include neu onal ne wo ks, and
suppo ec o machines. The compa ison o he logi model applied in he p esen s udy
and hese al e na i e me hodologies will p obably e eal in e es ing di e ences ega -
ding he numbe o independen a iables in he models and he a e o success.
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