ASTAM Coverage Modifications
ASTAM coverage modifications change the payment variable before the distribution is summarized. Deductibles, limits, coinsurance, stop loss reinsurance, and inflation are contract translations first and calculations second.
SOA Exam ASTAM
Official syllabus, notation, formula sheet, introductory note, study notes, and released exams are mapped for topic planning.
What the official PDFs establish
- Format
- 3-hour exam with six questions and 60 total points.
- Excel component
- One question is answered in an Excel workbook; five questions are answered in written booklets.
- Assumed knowledge
- FM, P, FAM, and mathematical statistics VEE are assumed.
- Submission split
- The Excel workbook is uploaded for the Excel question, while answer booklets are submitted for the written questions.
- Tables and formula access
- Paper tables and the paper formula sheet are not supplied; candidates use the provided Excel workbook and official electronic resources.
Topic and domain coverage
| Topic | Weight | Source |
|---|---|---|
| Severity Models | 8-18% | Source: Exam ASTAM Syllabus, p. 2 |
| Aggregate Models | 12-22% | Source: Exam ASTAM Syllabus, p. 2 |
| Coverage Modifications | 8-18% | Source: Exam ASTAM Syllabus, p. 2 |
| Construction and Selection of Parametric Models | 14-24% | Source: Exam ASTAM Syllabus, p. 3 |
| Credibility | 12-20% | Source: Exam ASTAM Syllabus, p. 3 |
| Reserving and Pricing | 15-29% | Source: Exam ASTAM Syllabus, p. 4 |
Chapter and reading intelligence
- Loss Models, fifth edition
Selected sections from chapters 3, 5, 7-9, 11-13, 15, 17, and 18 are mapped in the syllabus.
- Introduction to Ratemaking and Loss Reserving
Selected sections from chapters 1, 4, and 5 are listed for ratemaking and loss reserving context.
- Outstanding Claims Reserves and QERM Chapter 5
Study notes support reserving and risk-measure topics; the guide summarizes concepts and links official materials.
Official files used by the map
- Official syllabussyllabus
Primary source for format, topic weights, and readings.
Source: Spring 2026 Exam ASTAM Syllabus - Notation guidenotation
Use for notation consistency in examples.
Source: ASTAM Notation for Spring 2026 - Formula sheetformula-sheet
Use to separate supplied formulas from skills that still need memory and practice.
- Introductory study notestudy-note
Use for exam logistics, Excel workbook submission, and software expectations.
- Released ASTAM exams and solutionsreleased-exam
Use for topic maps and answer-style analysis; do not republish questions or solutions.
Source: April 2026 ASTAM Exam
Quick Answer
The Spring 2026 ASTAM syllabus gives coverage modifications an 8-18% weight. The outcomes name deductibles, policy limits, maximum covered loss, coinsurance, stop loss reinsurance, loss elimination ratios, increased limits factors, deductible factors, and inflation.
This topic is dangerous because the formulas are usually simple after the payment variable is right. Most errors happen before the integral starts.
Payment Variable First
For an ordinary deductible d and insurer payment Y, start from Y = max(X - d, 0). With a policy limit u on the insurer payment, use Y = min(max(X - d, 0), u). Coinsurance then scales the insurer payment.
Maximum covered loss is not the same phrase as policy limit in the ASTAM notation note. Read the contract wording and draw the payment function before calculating.
LER, ILF, And Deductible Factors
A loss elimination ratio measures the portion of expected ground-up loss removed by a deductible. An increased limits factor compares expected limited losses at two limits. A deductible factor adjusts expected payments for a selected deductible.
These factors are pricing tools. The best written answers say both what was calculated and how the factor changes the indicated premium.
Original Practice Drill
Let X have a Pareto Type II severity with scale theta and shape alpha. Define three payments: ground-up limited to 5,000, ordinary deductible 500 with no payment limit, and deductible 500 with payment limit 4,500. Write each payment variable, then compute or simplify each expected payment.
Before doing algebra, state whether the contract language is about loss size, insurer payment, or reinsurer payment. That sentence is the best guardrail against using the wrong limit.
Common Traps
Trap 1: applying coinsurance to the loss before the deductible when the policy wording applies it after the deductible.
Trap 2: treating an excess-of-loss reinsurance attachment point as if the direct insurer pays above the point.
Trap 3: inflating the loss but forgetting that fixed deductibles and limits may remain nominal unless the problem says they trend too.
Original exam practice
3 questions built from syllabus outcomes and released-exam patterns. The prompts and answers are original, so they train the skill without copying official exam text.
ASTAM Coverage Payment Drill
Contract-translation checks for deductibles, limits, coinsurance, inflation, LERs, and ILFs.
- Question 1/Calculation
Deductible then coinsurance
A policy pays 80 percent of loss above a 500 deductible, with no payment limit. Write the insurer payment Y for ground-up loss X.
Solution and grading points
Y = 0.80 max(X - 500, 0). The coinsurance applies to the payment after the deductible because that is how the wording states it.
- Applies the deductible before coinsurance.
- Uses max(X - 500, 0).
- Explains the contract-ordering assumption.
- Question 2/Flashcard
LER and ILF
Define loss elimination ratio and increased limits factor in pricing language.
Solution and grading points
A loss elimination ratio measures the expected ground-up loss removed by a deductible. An increased limits factor compares expected limited losses at two limits.
- Defines LER through deductible removal.
- Defines ILF through a ratio of limited expected losses.
- Connects both quantities to pricing.
- Question 3/Written Answer
Inflation and nominal limits
A problem inflates losses by 6 percent but does not say policy limits trend. What should you do with a fixed policy limit?
Solution and grading points
Inflate the loss distribution or loss amounts, but keep the policy limit nominal unless the problem says the limit changes too. State that assumption before calculating.
- Inflates losses.
- Keeps the fixed limit unchanged unless instructed.
- States the assumption before computing payments.