# README

10 is the technical company of a group working across research,
markets, and applied technology. It builds and holds the systems the
group's operating entities run on, and licenses them within the group
and selectively outside it. All engineering in the group is done here.

## 1 Usage

- **Tabs**: readme · systems · releases · careers. Keys 1 to 4, or
  click. Each tab is a command; the console echoes it.
- **Sidecar**: the index of the active tab. ↑ ↓ move, enter selects.
- **Pane**: the selected item. The path bar shows its file, commit and
  date; the same appears when the cursor rests on any text.
- **Console**: / brings it to the front and begins a command; esc
  switches back to the workspace, and the console stays open behind
  it. /help lists commands, /help <command> explains one. ↑ ↓ recall
  history; tab completes.
- **Theme**: follows the system. /theme dark · light · system
  overrides it, stored on this device.
- **Reboot**: r, or /reboot. Runs the boot sequence again and resets
  the workspace: tab, selection, scrollback. Theme and history
  persist. /log reprints the boot log.
- **Storage**: nothing is sent unless you send it: /contact and
  /releases transmit what you enter, and a game replay only if you
  submit it. Nothing else.

## 2 Systems

- **Market data**: ingestion from venues and vendors; normalisation;
  point-in-time storage of ticks, bars, reference data and calendars
- **Market modelling**: price, volatility and microstructure models
  calibrated to tracked data; regime identification
- **Simulation**: replay and generative engines; execution simulation
  with fill, spread, impact and latency models; environments in which
  people or algorithms act under codified conditions
- **Signal research**: feature pipelines over market and behavioural
  data; out-of-sample and walk-forward validation; leakage controls;
  correction for the number of trials
- **Decision modelling**: models of human decision-making under
  uncertainty from recorded decision records; separation of skill from
  variance against algorithmic baselines
- **Portfolio and risk**: position sizing, exposure and drawdown
  constraints, covariance and factor estimation, scenario analysis;
  risk conditions codified and evaluated deterministically
- **Rule engines**: codified determinations executed without discretion
  and reproducible from inputs
- **Deployment**: validated signal to systematic and discretionary
  deployment; pre-trade checks; paper and live parity; human
  authorisation for irreversible actions
- **Learning systems**: training and evaluation pipelines; pinned data
  versions; model registry with provenance
- **Operating infrastructure**: messaging, identity and access,
  permissioned retrieval, document generation, this site

_Detail under systems._

## 3 Methods

- **Determinism**: rule evaluation is a pure function of recorded
  state; same inputs, same outputs, replayable
- **Time**: every record carries its timestamp and clock; evaluation
  times are published before they apply
- **Versioning**: rules, datasets and documents are versioned; changes
  announced before effect; prior versions readable
- **Disclosure**: fill, spread, commission and slippage models are
  documented for those acting under them
- **Testing**: property tests on rule engines; recorded sessions
  replayed against new rule versions; invariants checked continuously
- **Review**: a change is accepted on the strength of its mechanism,
  not its author, the principal's included
- **Vocabulary**: terms are defined once, in the agreements; the code
  uses the same names
- **Provenance**: every artefact carries file, section, version, date
  and commit; statuses are distinct: draft, stated, in use, approved

## 4 Constraints

10 builds and holds systems. It deploys no capital and holds no client
assets; deployment is the mandate of the group's operating entities,
under their own risk conditions.

Simulated environments route no order to a venue. Deployment systems
do, with pre-trade checks against the risk engine, and a person's
recorded authorisation for any irreversible action.

Determinations that must not depend on judgement are executed by
rules, with no discretionary step.

No number is displayed that is not measured.

Data is used for the purpose stated when it was contributed.

What can be checked is published. The rest is disclosed by
introduction.

## 5 Interfaces

- **Within the group**: systems and datasets licensed to operating
  entities under intra-group agreements
- **Outside the group**: datasets and systems licensed to systematic
  investors and developers of decision systems, by introduction:
  [io@10.xyz](mailto:io@10.xyz)
- **Parent**: [heliopause.inc](https://heliopause.inc)