sub-prime credit crisis of 07

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  • 8/3/2019 Sub-Prime Credit Crisis of 07

    1/56Electronic copy available at: http://ssrn.com/abstract=1112467

    The Subprime Credit Crisis of 07*

    !"#$"%&"'()*+(*,,-(

    ."/01"2(3456(7(*,,8(

    Michel G. Crouhy, Robert A. Jarrow and Stuart M. Turnbull

    JEL Classification:(9**+(9:,+(9:*+(9:8(

    Keywords:+(;?1+(%@A@50A"1+('B$0AC(BC"AD0"1+('01E(%BABC"%"A$+(1"D4'0$0FB$0@A+(!GH1+(

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  • 8/3/2019 Sub-Prime Credit Crisis of 07

    2/56Electronic copy available at: http://ssrn.com/abstract=1112467

    ='"20$(='0101( ='@4K6+(3B''@Y(BA2(R4'A&455( *

    Abstract

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    ='"20$(='0101( ='@4K6+(3B''@Y(BA2(R4'A&455( :

    Introduction

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    Section 3: Players and Issues at the Heart of the Crisis

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    &@A21(T@'(0A/"1$%"A$(C'B2"(&@A21U(Y0$K(K0CK"'(60"521(TBA2('"YB'21U(P@'(k"a40/B5"A$('01EIl(

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    3.7 The Economy and Central Banks

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    201D@4A$('B$"(B$($K"(c"2(Y0A2@YI(

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    "A2(@P(2B6+(0$(D5@1"2(B$(:I,^iI((O@Y"/"'+(@$K"'(#B'$1(@P($K"(P0N"2(0AD@%"(%B'E"$1(D@A$0A4"2($@(

    P4AD$0@A+(Y0$K(0A/"1$%"A$(C'B2"(D@%#BA0"1(01140AC(2"&$L(=@%DB1$(=@'#(1@52(Z!b:(&0550@A(0A(

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    k0A/"1$%"A$(C'B2"l(D'"20$('B$0AC1IVV(

    3.8 Valuation Uncertainty

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    "NB%#5"+(/B54B$0@A(4A2"'(h"/"5()(DBA(&"(BDK0"/"2(P@'(1$BA2B'2(0A1$'4%"A$1(14DK(B1(D'"20$(2"PB45$(

    1YB#1(P@'(Y"55(EA@YA(@&50C@'1I((c@'(B(D'"20$(2"PB45$(1YB#(Y0$K(B(A@A]1$BA2B'2(%B$4'0$6+(20'"D$(

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    P"55(8I-iI((`NDKBAC"1('B$"1(Y"'"(BPP"D$"2+(B1(P4A21('"24D"2($K"0'(5"/"'BC"I((!"550AC(&6(K"2C"(

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    3.9 Transparency

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    BA2(KB1(#'@24D"2(B(%B'E"$(P@'(5"%@A1(o(T4A1@#K01$0DB$"2U(0A/"1$@'1(B'"(4AB&5"($@(@&1"'/"(@'(

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    0$1(K0CK(C'B2"(P4A21(@A(!"#$"%&"'(:+(*,,-+(D0$0AC(k1"/"'"(0550a4020$6(0A($K"(%B'E"$Il((RK"(

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    8I ."C45B$@'1(A""2($@(%@A0$@'($K"('B$0AC(BC"AD0"1(Y0$K('"1#"D$($@(2B$B(a4B50$6+(%"$K@2@5@C0"1+(BA2($K"("PP0DBD6(@P($K"0'(#'"20D$0@AI((RK"(0AK"'"A$(D@AP50D$1(@P(0A$"'"1$(

    &"$Y""A($K"('B$0AC(BC"AD0"1(BA2($K"0'(D50"A$1(A""21($@(&"(B22'"11"2I7)(RK"(B&050$6($@(

    #"'P@'%(0A2"#"A2"A$(/B502B$0@A(@P('B$0AC1(Y@452(C@(B(5@AC(YB6($@('"24D"($K"("PP"D$1(@P(

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    4.6 Risk Management Issues

    RK"(!"A0@'(!4#"'/01@'1(9'@4#(0114"2(B('"#@'$(0A(JB'DK(*,,8($KB$(02"A$0P0"1('01E(%BABC"%"A$(#'BD$0D"1($KB$(20PP"'"A$0B$"(P0ABAD0B5(0A1$0$4$0@A1($KB$(KB/"(&""A(B&5"($@(Y"B$K"'(

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    &"($BE"AX($K"1"(P0'%1(KB/"('01E(%BABC"%"A$(D@%%0$$""1($KB$(%""$(@A(B(Y""E56(&B101($@(201D411(B55(

    10CA0P0DBA$('01E("N#@14'"(BD'@11($K"(P0'%+(BA2(0AD542"(1"A0@'(%BABC"%"A$(T=`?+(=c?+(=.?+(

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    BD$4B5(BA2(D@A$0AC"A$(50a4020$6('01EX($K"1"(P0'%1(KB2(0A(#5BD"(0A$"'AB5(#'0D0AC(%"DKBA01%1($KB$(

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    P0A20AC($K"('0CK$(&B5BAD"(&"$Y""A($K"(2"10'"($@(2"/"5@#(A"Y(&410A"11"1(BA2($K"('01E(B##"$0$"(@P($K"(

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    "N01$"AD"(@P(@'CBA0FB$0@AB5(105@1(0A($K"(1$'4D$4'"1(@P(1@%"(P0'%1(B##"B'"2($@(&"(2"$'0%"A$B5($@($K"(

    P0'%1m(#"'P@'%BAD"(24'0AC($K"($4'%@05I(c0'%1($KB$(B/@02"2(10CA0P0DBA$(5@11"1(D0$"2(B(2"C'""(@P(

    0A$"C'B$0@A(B%@AC($K"(50a4020$6+(D'"20$+(%B'E"$(BA2(P0ABAD"(D@A$'@5(1$'4D$4'"1I(c0'%]Y02"('01E(

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    a4B50$6(@P($K"(5@BA1($@(&"(1"D4'0$0F"2I(RK"'"(01(B(A""2($@(&"$$"'(B50CA(D@%#"A1B$0@A(BA2(@$K"'(

    0AD"A$0/"1(Y0$K($K"(0A$"'"1$1(@P($K"(0A/"1$@'1(BA2(@P($K"(1KB'"K@52"'1(@P($K"(P0'%+(BA2($@(P0A2($K"(

    B##'@#'0B$"(&B5BAD"(&"$Y""A(1K@'$]'4A(BA2(5@AC]'4A(#"'P@'%BAD"+(BA2(&"$Y""A(0A20/024B5(

    &410A"11(4A0$(C@B51(BA2($K"(P0'%]Y02"(@&_"D$0/"1I(RK"(@'0C0AB$"]$@]201$'0&4$"(&410A"11(%@2"5(KB1(

    D'"B$"2(0AD"A$0/"1(P@'(&@$K(P0'%1(BA2(0A20/024B51($KB$(KB/"(D@AP50D$"2(Y0$K(1@4A2(4A2"'Y'0$0AC(

    #'BD$0D"1+('01E(%BABC"%"A$(&"1$(#'BD$0D"1(BA2($K"(0A$"'"1$(@P(0A/"1$@'1(BA2(1KB'"K@52"'1I((

    Recommendations

    )I c0'%1(1K@452(B2@#$(B(D@%#'"K"A10/"(P0'%]Y02"('01E(%BABC"%"A$(BA2(1KB'"(a4BA$0$B$0/"(BA2(a4B50$B$0/"(0AP@'%B$0@A(0A('01E(%BABC"%"A$(D@%%0$$""1($KB$(%""$(P'"a4"A$56(BA2(

    0AD542"(1"A0@'(%BABC"%"A$(B1(Y"55(B1(K"B21(@P(&410A"11(50A"1+(5"CB5(BA2(D@%#50BAD"(

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    :I RK"($'"B14'6(P4AD$0@A1(1K@452(&"(D5@1"56(B50CA"2(Y0$K('01E(%BABC"%"A$($@(#5BA(BA2(D@A$'@5(&B5BAD"(1K""$+(50a4020$6(BA2(DB#0$B5(#@10$0@A1I(

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    VI RK"(0AD"A$0/"(BA2(D@%#"A1B$0@A(161$"%(1K@452(&"('"/0"Y"2($@(&"$$"'(B50CA($K"(0A$"'"1$1(@P(B55($K"(#B'$0D0#BA$1(0A($K"(1"D4'0$0FB$0@A(DKB0A(Y0$K($K"(0A$"'"1$1(@P($K"(0A/"1$@'1(BA2(

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    5 Summary(

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    Appendix A

    Biggest losses/write-downs since the beginning of 2007, in billions of US$ as of April 2008

    (Source: Bloomberg)

    (

    =0$0C'@4#( ( ( ( ( b^,I7(

    Z

    J"''055(h6ADK( ( ( ( ( b:)I-(

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    Exhibit 1

    ="A$'B5(

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    Exhibit 2: Cliff effects or non-linearities in the risk of subprime CDO tranches

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    References

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