Source-aware field guide · 20 answers
Copy Trading, PAMM and MAM
Copy trading, PAMM and MAM definitions with operational controls for leader-follower copying, managed-account allocation, fees, risk and reporting.
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How to use this guide
Definitions and operational controls for leader-follower copying, managed-account allocation, fees, risk, divergence and reporting. The guide is written for brokers, money managers, social-trading operators, integrators and account reviewers. The collection explains technology and records. It does not recommend a leader, manager or investment and does not establish permission to offer a service.
Use every answer to resolve one operational question: How does an instruction or result move from strategy to account, and can every allocation, fee and exception be reconstructed? Legal structure, discretion, client authorization and product rules differ by jurisdiction. Technology availability does not decide those obligations.
The supporting set is Investor.gov — Investing basics and glossary; FIX Trading Community — Standards; FATF — International standards on AML and CFT. These links provide standards, regulator material or official product documentation for the subject; they do not imply endorsement, worldwide applicability or a verified feature in a particular deployment. Check the current source, contract, configuration and qualified local advice before a production, trading or compliance decision.
What Is Copy Trading?
Copy trading uses rules or software to reproduce selected source-account actions in follower accounts according to size, risk and execution settings.
- Use it to
- Map consent, source events, follower orders, divergence and stop behavior.
- Check the boundary
- Followers can receive different prices and losses, and historical leader results are not guarantees.
What Is Social Trading?
Social trading combines publication, discussion or following of traders and strategies with optional account actions under the platform's features and policies.
- Use it to
- Separate content, signals, copying, compensation and regulated activity.
- Check the boundary
- Popularity metrics and public profiles do not verify skill or suitability.
What Is a PAMM Account?
A PAMM account, short for percent allocation management module, is a pooled arrangement in which one manager trades a master account and each investor receives a share of the results in proportion to their share of the pool, after the agreed fee rules are applied.
Practical steps
- Use the PAMM meaning as the test: one master account, one trading result, split by capital share. Record each investor's share of the pool at the start, in a stated unit such as a percentage or a share count.
- Have the manager trade the master account under one strategy. That account is the only source of profit and loss for the pool, so every follower of the pool shares the same trading decisions.
- At each valuation point, value the pool, compute the period result, and allocate it to each investor by share. Keep the valuation time and price source with the calculation.
- Apply deposits and withdrawals to shares at the time they are processed, not at the time they were requested, so each result is matched to the capital that actually earned it.
- If the contract includes a performance fee, apply it only to eligible gains after the stated high-water mark and any hurdle, and record whether losses must be recovered first.
- Reconcile investor balances, the master account and the fee ledger at every valuation point, and keep enough detail that any investor figure can be reproduced from the records.
PAMM vs MAM vs copy trading: how capital, results and records differ
| Feature | PAMM account | MAM account | Copy trading |
|---|---|---|---|
| Trading account | One master account trades for the pool | One manager sends or allocates instructions to linked accounts | A source account's actions are reproduced in follower accounts |
| Investor capital | Pooled and shared by percentage of the pool | Stays in each linked account and is sized by lot, percentage, equity or risk method | Stays in each follower account and is sized by follower settings |
| How results are recorded | One pool result, allocated to shares at valuation points | Each account records its own result from allocated trades | Each follower records its own result from copied orders |
| Reconciliation point | Share values, deposits, withdrawals and fees at each valuation point | Master fills against follower fills | Source events against follower orders and positions |
| Source of difference | Timing of deposits, withdrawals and valuation | Rounding, minimum lot sizes and account restrictions | Price, delay, rejected orders and partial fills |
Illustrative example: one pool, two investors
Assumptions for this example only, not a return or a fee recommendation: Investor A deposits $60,000 and Investor B deposits $40,000, so the pool holds $100,000 and the shares are 60% and 40%. The contract has a 20% performance fee on gains, no hurdle and an opening high-water mark of zero. Spreads, commissions and other costs are ignored.
In one period the master account gains $5,000, which is 5% of the pool. Before fees, Investor A receives $3,000 (60%) and Investor B receives $2,000 (40%). The fee is 20% of each share of the gain, which is $600 for Investor A and $400 for Investor B, and the manager receives the $1,000 in total. Net gains are $2,400 for Investor A and $1,600 for Investor B.
If the pool had lost $5,000 in the same period, no performance fee would be due in this simple model, and the loss would be split $3,000 and $2,000. The example does not show how a real manager trades, what any investor should expect, or whether a PAMM arrangement is permitted where you operate.
- Use it to
- Reconcile capital shares, cash flows, results and fees at each valuation point.
- Check the boundary
- The PAMM label does not establish custody, legal structure or authorization.
References for this answer · Checked
What Is a MAM Account?
A multi-account manager sends or allocates trading instructions across linked accounts using specified quantity, risk or equity methods while accounts remain separately recorded.
- Use it to
- Test order handling, partial fills, minimum size, divergence and account restrictions.
- Check the boundary
- One master instruction does not guarantee identical follower results.
What Is a Master-Follower Account Model?
A master-follower model designates a source of trade events and one or more destination accounts with mapping, sizing, filtering and lifecycle rules.
- Use it to
- Record ownership, permissions, identifiers and event state across both sides.
- Check the boundary
- Account linking must not be inferred from similar trades alone.
How Does Proportional Copying Work?
Proportional copying scales follower quantity by a declared balance, equity, risk or multiplier relationship to the source order.
- Use it to
- Choose the base, update timing, caps, conversion and rounding rules.
- Check the boundary
- Equity changes and minimum lots cause allocations to diverge.
How Does Fixed-Lot Copying Work?
Fixed-lot copying assigns a preset follower quantity to each eligible source order regardless of source size unless another rule overrides it.
- Use it to
- Test symbols, contract sizes, account leverage and maximum exposure.
- Check the boundary
- The same lot across different instruments or accounts does not mean the same risk.
How Do Copy Multipliers Work?
A copy multiplier scales a source quantity by a configured factor before instrument conversion, rounding and risk limits.
- Use it to
- Define multiplication order, minimum and maximum size and update authority.
- Check the boundary
- Large factors can exceed follower capacity even when the source trade is small.
Balance vs Equity Allocation
Balance-based allocation uses posted account balance while equity-based allocation includes current open profit and loss under defined valuation timing.
- Use it to
- Choose one base and document when it is sampled and recalculated.
- Check the boundary
- Rapid equity movement can change allocations between instruction and execution.
How Does Managed-Account Allocation Work?
Managed-account allocation assigns master activity and results to linked accounts under a method such as lot, percentage, equity or risk weighting.
- Use it to
- Reconcile master fills with follower fills and retained rounding differences.
- Check the boundary
- Allocation at order, deal and end-of-day stages can produce different results.
How Are Performance Fees Calculated?
A performance fee applies a contract percentage to eligible gains under a stated high-water mark, hurdle, cash-flow and crystallization method.
- Use it to
- Reproduce the fee for deposits, withdrawals, losses and recovery periods.
- Check the boundary
- Gross profit and fee-eligible profit are not always the same base.
What Is a Copy-Trading Subscription Fee?
A subscription fee charges for access to a signal or service under amount, period, renewal, cancellation and refund terms separately from trading performance.
- Use it to
- Connect billing state with copying access and client disclosures.
- Check the boundary
- Paying a fee does not validate the provider's results or eliminate trading loss.
What Causes Copy-Trading Delay?
Copy-trading delay accumulates across source event detection, network, processing, follower submission and execution, affecting price and fill divergence.
- Use it to
- Timestamp every stage and report median and tail delays.
- Check the boundary
- Fast average latency can hide severe delays during volatile periods.
Why Do Copied Trades Diverge?
Copied trades diverge because of price, delay, symbol mapping, quantity rounding, margin, account settings, rejects, partial fills and lifecycle differences.
- Use it to
- Classify each difference from source event to follower outcome.
- Check the boundary
- Labeling all variance as slippage hides configuration and state errors.
How Do You Stop Copy Trading Safely?
Stopping copy trading requires separate decisions about blocking new source events, cancelling pending follower orders and leaving or closing open positions.
- Use it to
- Offer explicit choices and record resulting exposure on every account.
- Check the boundary
- Disconnecting the copier does not necessarily flatten positions.
How to Set Copy-Trading Risk Caps
Copy-trading risk caps limit follower size, exposure, loss, symbols or concurrent positions independently of the source strategy.
- Use it to
- Test precedence when several caps apply and communicate rejected actions.
- Check the boundary
- Source exits must still be handled safely after an entry was reduced or blocked.
How to Evaluate a Strategy Leader
Leader evaluation reviews verified account history, cash flows, leverage, drawdown, concentration, costs, account type and behavioral consistency under comparable periods.
- Use it to
- Use raw or independently verified records and report uncertainty.
- Check the boundary
- Rankings and percentage return can be distorted by short history or changing capital.
What Should Copy-Trading Reports Show?
Copy-trading reports should connect source instructions, follower orders, fills, costs, current exposure, divergence and fees with stable identifiers.
- Use it to
- Allow users and operators to trace every copied and skipped event.
- Check the boundary
- Aggregate returns without event links cannot explain disputes.
What Disclosures Does Copy Trading Need?
Copy-trading disclosures should explain roles, account control, risks, fees, conflicts, execution differences, data and stopping behavior in language suited to the service and jurisdiction.
- Use it to
- Align disclosures with the actual product and current agreements.
- Check the boundary
- Generic past-performance text does not cure misleading claims or hidden mechanics.
How to Reconcile Copy-Trading Accounts
Copy-trading reconciliation compares source events with each follower instruction, execution, position and account entry and explains every mismatch.
- Use it to
- Run event-level and position-level checks with correction controls.
- Check the boundary
- Matching net exposure can conceal missed opens, duplicated closes or wrong identifiers.
Primary and official references
These sources establish definitions, standards or official product behavior used across this guide. Follow the exact source and check its current version before a live implementation.