Every answer and its explanation appears here once you have finished the path. Each one then links to the matching glossary entry, where the concept is set out in full with its worked example.
1. A claims manager rules out a recovery because the damage, 300,000 euros, is below the 2 million retention line. Where is the error?
He applies non-proportional logic to a proportional treaty: a surplus treaty never compares the loss to the retention, it compares the sum insured to the line, once, when the risk enters
This is the commonest confusion about this structure, and it is natural because the word retention suggests a threshold. The rate is set once, when the risk enters, and then applies to the premium and to every loss in the same proportion: a risk ceded at 87.5 percent gives an 87.5 percent recovery on a 300,000 euro loss as on a total one. The answer on events imports a notion from non-proportional treaties. The one invoking the priority names a term that does not exist in a proportional treaty. The one on the table of lines inverts its purpose: the table grades lines by the quality of the risk, it does not decide a full cession.
Glossary entry →2. The table of lines is one of the documents a reinsurer scrutinizes most. What does it read there, and what does a generous table at the low end signal?
It reads there the underwriting discipline it is funding: a high line on poor risks is a polite way of ceding them more than the good ones
Under a surplus treaty the cedant chooses on every piece of business by setting the applicable line, and it is that freedom the table describes. A reinsurer therefore buys two things at once, a portfolio and the judgment of whoever allocates. The answer on total capacity states an accurate calculation unrelated to what the table reveals. The one on pricing invents a link between line and premium, whereas the line expresses what the cedant agrees to CARRY. The one on geography describes a grading that sometimes exists and belongs to accumulation, not to the quality of the risk.
Glossary entry →3. Do two neighboring warehouses separated by a firewall make one risk or two? Why does that question weigh more than the number of lines granted?
Because it decides the capacity actually available: if they are two risks, each consumes its own set of lines and capacity doubles; if they are one, a single set covers both
The deciding rule, usually based on physical separation and on whether one loss could reach both, matters more to the cedant than the number of lines granted: it multiplies that number or does not. The answer on premiums describes a minor accounting consequence. The one on the hours clause imports a mechanism from per-event treaties, foreign to a proportional structure. The one on classification confuses two separate settings: the category fixes the HEIGHT of the line, the unit of risk fixes HOW MANY TIMES it can be used.
Glossary entry →4. Beyond the structure's mechanical effects, what does a surplus treaty reinsurer really buy that its quota share counterpart does not?
The judgment of whoever allocates: under a quota share the cedant chooses nothing, under a surplus treaty it chooses on every case, and antiselection becomes the real subject of the structure
This is what separates the two structures within the same family, and it is why the clauses framing the cedant's freedom, the definition of the unit of risk, homogeneous cession, no changing the table mid year, are not paperwork. The three other answers state accurate effects of a surplus treaty. It does concentrate high sums insured, it does make retention homogeneous, and its average rate does move with the portfolio. None of those effects requires trusting anyone, and that trust is the real purchase.
Glossary entry →5. A twenty percent quota share placed before a surplus treaty does not give the same result as a surplus treaty followed by a quota share on the retention. What changes?
The first structure applies the lines to the retained share, which widens gross peak capacity; the second leaves it intact and only lightens the retention
A reinsurance program is always read in its order of application, never as a list of treaties, and that order is nowhere clearer than here: the same pair of treaties gives different peak capacity depending which comes first. Placed in front, the quota share leaves 80% of each risk with the cedant and the lines apply to that share: gross capacity becomes the number of lines plus one, divided by 0.8, a quarter more. The answer on commission reasons soundly about the base and misses the stake, which is capacity. The one exposing the quota share reinsurer to large risks describes the opposite of that structure, a quota share on retention seeing only what the cedant keeps. The one concluding they are equivalent is the most attractive because the two look alike on paper, and it erases precisely the difference that counts.
Glossary entry →