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Default prediction of Spanish companies. A logistic analysis

Bartual Sanfeliu, Concepción,García García, Fernando,Guijarro Martínez, Francisco,Moya Clemente, Ismael

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. 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