FACTBOX: UBS details its subprime and other exposures

ZURICH (Reuters) - UBS (UBSN.VX), which reported a record 2007 loss on Thursday, has also published a detailed breakdown of its exposures to subprime and other debt.

UBS made writedowns of about $18 billion on subprime and other exposures in 2007, making it one of the biggest casualties of the crisis, and some investors fear it may have to take more charges this year.

EXPOSURES AT END-DECEMBER, 2007

SUB-PRIME EXPOSURES

Super Senior RMBS CDO* $13.325 bln

Residential mortgage-backed securities (RMBS) $14.196 bln

Warehouse and retained RMBS CDO $73 mln

Total $27.594 bln

*CDOs are collateralized debt obligations

EXPOSURES TO ALT-A MORTGAGES**

AAA-rated RMBSs backed by first lien mortgages*** $21.2 bln

Non-AAA RMBSs or backed by second lien mortgages $5.4 bln

** Alt-A mortgages are less risky than subprime.

*** first lien mortgages give lenders senior claim on the

borrower, second lien loans are subordinate to first lien.

EXPOSURE TO MONOLINE INSURERS****