Ctrl+EnterbuildCtrl+Spaceautocomplete; Tab takes the suggestionCtrl+Ksearch the example libraryCtrl+↑↓step through history (or the two arrows in the editor's right margin)Ctrl+Shift+↑↓step through the example library (loads, does not build); the counter beside the editor says where you are, and walks whatever the Examples menu is filtered and searched down toCtrl+Shift+Uflip every table between static and interactiveCtrl+Shift+Vflip every exhibit between the raw frame and the insurer reading; the pair beside the versions says which one you are onAlt+1…6jump to an output group, numbered in the order they are listed below←→HomeEndwalk a group or leaf row once it has focus, skipping whatever is dark✕clear the editor; press it again on an empty box to clear your history
Ctrl+Shift+V stands aside inside the program box and the
entry forms, where the browser claims it for paste, and works everywhere else.
Menu ▸ Editor ▸ Emacs keys adds Ctrl+A/E/K/Y, N/P and F/B/D in the
program box.
Controls
Build: run the program (same as Ctrl+Enter)
Examples: load a ready-made program. Type to search it,
or click the tag pills to narrow it; the arrow walk follows what is left on
screen
Reformat: rewrite the program in canonical form, keeping
its note{}, hints{} and tags{}
Sharpen: audit the grid and move to a better one, writing
the hints{} clause that pins it
Hints: keep the grid you have and write it into
hints{}, so agg.Name elsewhere means one fixed thing
PnL: wrap what you built in a profit and loss account.
Once a P&L is what you are reading the button becomes
Explode, which opens it back into its parts
GCN: read a program with an occurrence cession as a pair
of views. The button takes gross / ceded; the caret beside it offers
gross / net and net / ceded
Each derivation writes DecL into the editor, so you can
read what it did, edit it, and build it again anywhere. The
↑ in the editor's right margin walks back through the programs you
built, which is how you undo one.
Output groups
Overview: the distribution and its tail, then the moments
and whether to believe them (Plot, Summary, Validation, Stats, Tail)
Re: reinsurance, ceded and net by layer, with the shape and
the densities the cession leaves. The Quick Re row writes one layer into the
program above, on the occurrence or the aggregate tier
Pricing: calibrate a distortion set to a target, price
the parts stand-alone, allocate one premium across them, read the kappa curves
behind the split, or evaluate a premium already set
PnL: a P&L's ledger, its ratios, and the margin
walk
Bounds: how much of a price the choice of distortion
decides, for the whole and for the parts
A group or a leaf greyed out is one this object cannot
answer; hover it to read why. Nothing is hidden, so the menu is always the same
shape.
Tables and charts
Tables: static, static at full precision, or interactive,
from the menu or with Ctrl+Shift+U. An interactive grid sorts, filters and
searches, and its toolbar copies or saves the underlying values rather than the
printed text
Perspective: Raw is the frame as computed, Insurer is the
business reading of it. The two words beside the versions are a readout and a
switch at once
Charts: the strip under a picture carries that panel's
axis readings, log x, log y, full range, reflect, return period, invert, and its
reference lines. Download saves the picture as a PNG
Joint surface: a relief adds contours, marginals, mesh,
wall grid and lights; cut cycles through the slices; a click reads that cell out
in the strip; double-click, or reset, puts the camera back. Download also writes
the drawn surface as GLB, OBJ or STL, and a SpaceMouse can fly it in Chromium
Menu ▸ Download models saves every program you built
this session as one .agg file.
This is a shared, free demo, so builds are
rate-limited. Want no limits? aggregate is open source, so you can
run it locally.
About
The aggregate Loss Lab (aLL): build and
explore compound (aggregate) loss distributions in the browser,
powered by the open-source aggregate library.
Versions
aggregate
…
aggregate_api
…
csv-grid
…
greater-tables
…
ECharts
…
echarts-gl
…
Bootstrap
…
plugins
…
Disclaimer
aLL is a free research and educational tool built on the open
source aggregate library (BSD 3-Clause). All results
are provided as is, with no warranty of any kind. Nothing on this
site constitutes actuarial, financial, or other professional
advice, and no output is an actuarial communication within the
meaning of ASOP 41. Verify results independently before relying
on them. Submitted programs and sessions may be logged to operate
the service; do not submit confidential data. The service is
offered with no promise of availability and may change or be
withdrawn at any time. Third-party components are used under
their respective MIT, BSD, and Apache 2.0 licenses.