Waterfall Forensics.

Prime hybrid ARM RMBS

Wells Fargo Mortgage Backed Securities 2008-AR2

424B5 filed 2008-02-26, acc 0001193125-08-038785

machine-encoded from the prospectus by the extraction pipeline and tied out over 10 periods (2008-03-25 to 2008-12-26); not yet expert-verified

Backtested periods

10

2008-03-25 to 2008-12-26

Comparison points within $1

97.1%

280 points

Max principal delta

$0.01

interest $33564.50 · balance $0.02

What the encoder found in the filings

  • B-6: draft face 1,319,852.00 -> reported 1,319,852.75 (pinned from the remittance Original Balance)
  • group 1 has 3 senior classes (A-1, A-2, A-R); assumed pro rata, but the contract may pay them as components — check the tie-out
  • window starts at deal month 1 (2008-03-25); earlier reports are not in the machine-readable run

Capital structure · original faces

A-1
$175,893,000.00
A-2
$35,068,000.00
A-R
$100.00
B-1
$3,188,000.00
B-2
$1,869,000.00
B-3
$769,000.00
B-4
$1,319,000.00
B-5
$440,000.00
B-6
$1,319,852.75

viridian = senior (per-pool) · burgundy = cross-collateralized subordinates · IO classes (A-IO) accrue on senior notionals

Worst remaining deltas · computed vs reported

interest

2008-11-25A-1+33564.50
2008-11-25A-IO-33564.41
2008-10-27A-1-33381.62
2008-10-27A-IO+33381.08
2008-03-25A-IO-18738.30

principal

2008-09-25B-6-0.01
2008-10-27B-6-0.01
2008-11-25B-6+0.01
2008-04-25B-6+0.01
2008-08-25B-6+0.01

ending balance

2008-11-25B-1+0.02
2008-12-26B-1+0.02
2008-12-26B-6-0.02
2008-08-25B-6-0.02
2008-04-25A-1+0.01