Waterfall Forensics.

Prime hybrid ARM RMBS

Wells Fargo Mortgage Backed Securities 2006-AR6 Trust

424B5 filed 2006-03-30, acc 0001193125-06-068682

machine-encoded from the prospectus by the extraction pipeline and tied out over 9 periods (2006-04-25 to 2006-12-26); not yet expert-verified

Backtested periods

9

2006-04-25 to 2006-12-26

Comparison points within $1

98.5%

540 points

Max principal delta

$0.45

interest $3.26 · balance $0.46

What the encoder found in the filings

  • B-6: draft face 3,572,555.00 -> reported 3,572,555.71 (pinned from the remittance Original Balance)
  • group 1 has 2 senior classes (I-A-1, 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 2 senior classes (V-A-1, V-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 6 has 2 senior classes (VI-A-1, VI-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out
  • group 7 has 2 senior classes (VII-A-1, VII-A-2); assumed pro rata, but the contract may pay them as components — check the tie-out

Capital structure · original faces

I-A-1
$17,795,000.00
I-A-R
$100.00
II-A-1
$140,625,000.00
II-A-2
$16,238,000.00
III-A-1
$322,817,000.00
III-A-2
$14,309,000.00
IV-A-1
$78,017,000.00
IV-A-2
$9,009,000.00
V-A-1
$198,429,000.00
V-A-2
$8,795,000.00
VI-A-1
$102,356,000.00
VI-A-2
$11,819,000.00
VII-A-1
$768,781,000.00
VII-A-2
$34,076,000.00
B-1
$34,782,000.00
B-2
$9,810,000.00
B-3
$6,243,000.00
B-4
$3,568,000.00
B-5
$2,675,000.00
B-6
$3,572,555.71

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

Worst remaining deltas · computed vs reported

interest

2006-04-25VII-A-1-3.26
2006-06-26VII-A-1+2.99
2006-10-25VII-A-1-2.91
2006-05-25VII-A-1+2.49
2006-09-25VII-A-1+2.31

principal

2006-04-25VII-A-1+0.45
2006-04-25II-A-1-0.44
2006-04-25V-A-1+0.42
2006-04-25I-A-1+0.36
2006-12-26B-6-0.33

ending balance

2006-09-25II-A-1+0.46
2006-04-25VII-A-1-0.45
2006-06-26II-A-1+0.45
2006-07-25II-A-1+0.45
2006-08-25II-A-1+0.45