Waterfall Forensics.

Prime hybrid ARM RMBS

Wells Fargo Mortgage Backed Securities 2006-AR10

424B5 filed 2006-06-29, acc 0001193125-06-138929

machine-encoded from the prospectus by the extraction pipeline and tied out over 6 periods (2006-07-25 to 2006-12-26); not yet expert-verified

Backtested periods

6

2006-07-25 to 2006-12-26

Comparison points within $1

98.2%

396 points

Max principal delta

$0.14

interest $2.05 · balance $0.14

What the encoder found in the filings

  • B-6: draft face 7,356,499.00 -> reported 7,356,499.81 (pinned from the remittance Original Balance)
  • group 1 has 3 senior classes (I-A-1, I-A-2, I-A-R); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 2 has 2 senior classes (II-A-1, II-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 3 has 2 senior classes (III-A-1, III-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 4 has 2 senior classes (IV-A-1, IV-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 5 has 7 senior classes (V-A-1, V-A-2, V-A-3, V-A-4, V-A-5, V-A-6, V-A-7); assumed pro rata, but the contract may pay them as components — check the tie-out

Capital structure · original faces

I-A-1
$502,770,000.00
I-A-2
$26,462,000.00
I-A-R
$100.00
II-A-1
$223,830,000.00
II-A-2
$11,781,000.00
III-A-1
$129,583,000.00
III-A-2
$6,820,000.00
IV-A-1
$340,476,000.00
IV-A-2
$17,920,000.00
V-A-1
$300,000,000.00
V-A-2
$230,000,000.00
V-A-3
$368,153,000.00
V-A-4
$18,679,000.00
V-A-5
$163,104,000.00
V-A-6
$400,000,000.00
V-A-7
$77,891,000.00
B-1
$67,677,000.00
B-2
$22,069,000.00
B-3
$11,770,000.00
B-4
$8,828,000.00
B-5
$7,356,000.00
B-6
$7,356,499.81

viridian = senior (per-pool) · burgundy = cross-collateralized subordinates

Worst remaining deltas · computed vs reported

interest

2006-10-25I-A-1+2.05
2006-11-27I-A-1-1.57
2006-07-25IV-A-1-1.52
2006-11-27IV-A-1-1.21
2006-09-25I-A-1-1.15

principal

2006-07-25I-A-1+0.14
2006-07-25IV-A-1-0.13
2006-07-25II-A-1+0.06
2006-07-25V-A-3+0.04
2006-07-25III-A-1+0.04

ending balance

2006-12-26IV-A-1+0.14
2006-07-25I-A-1-0.14
2006-11-27I-A-1-0.14
2006-08-25IV-A-1+0.13
2006-09-25IV-A-1+0.13