G91's combined target is 50 shares, but the account holds only 44. The missing six are not holdings, yet they reserve cash. When another task requests a purchase, should it rely on the screen's $951 account balance or the strategy ledger's $211?
Use the same C10 synthetic account to connect research and implementation. Separate account facts from strategy ownership, follow each request, fill, and cancellation, then make the strategies' contributions explain every dollar. An attractive curve cannot establish whether the target actually filled.
Give strategies identities, not duplicate capital
You will merge targets into a net executable order, preserve strategy ownership of cash, reservations, and partial fills, and reconcile equity and contributions. You will also apply a fault policy and a separate household funding change without pretending they remove existing exposure automatically.
Retain the C10-v1 specification. The dollar account begins with $1,000 cash and 40 X shares at $10, totaling $1,400. Virtual ledger T has $400 cash and 30 shares; R has $600 and ten shares. Each starts with $700 equity. Unallocated cash is zero. There is no borrowing, external flow, tax, distribution, or cash interest.
Those two $700 amounts divide the actual $1,400; they are not additional funding. Strategy shares and cash must sum to the actual account. Their later equity follows contributions rather than resetting to equal budgets at every window. Repeated transfers to restore a losing strategy's budget could otherwise conceal its history.
Signals precede the next specified execution window, whose price is fixed in the exercise. Positions are long-only integer shares, without borrowing another strategy's cash. Opposing intentions first transfer shares and matching virtual cash internally at that price. Only the remainder trades externally. Charge $1 on an external order's first fill, with no repeat fee on later partial fills of that same order. Internal transfers and unfilled orders are free. These are teaching policies, not broker or CoTrading capability claims.
W1: the actual account need not trade
At $10, T's target falls from 30 to 20 shares while R's rises from ten to 20. The combined target remains 40, matching the actual position. Transfer ten shares from T to R internally, with $100 virtual cash moving from R to T. No market order is needed.
Each ledger now has $500 cash and 20 shares, still $700 equity. Actual cash remains $1,000 and the position 40, still $1,400 total. Internal allocation creates no exchange fill and no extra profit for T. It changes ownership records while preserving total assets.
Two separate brokerage accounts cannot assume free cross-account netting. Under the specified comparison, T sells ten and R buys ten at $10, each paying $1. Each then has $499 cash and 20 shares, or $699 equity: $1,398 combined instead of $1,400.
The package's complete separate-account comparison ends at $1,431, versus the shared account's $1,434, with $5 versus $2 fees. To isolate execution policy, it supplies partial-fill quantities that match ending holdings at each window. Actual markets need not produce that matching path. The $3 difference is not a universally available netting benefit.
W2: a target is not an actual position
At $12, each strategy's 20 shares raise its equity to $740, or $1,480 combined. T now targets zero; R targets 50. T reduces 20 while R adds 30. Transfer T's 20 shares to R and $240 virtual cash back to T first.
T now has $740 cash and no shares. R has $260 cash and 40 shares. The actual account still has $1,000 cash and 40 shares; no external fill has occurred. The remaining ten-share purchase belongs to R, not another new order for T.
Only four shares fill at $12. The $48 price plus the first-fill $1 fee leave R with $211 cash and 44 shares, or $739 equity. Actual cash is $951, and actual equity is $1,479. Six shares remain open; submitting the order did not place them in the portfolio.
Reserve $72 for those six at $12. The first-fill fee has already been charged, so this model reserves no second $1 for the same order. R's uncommitted cash is $211 minus $72, or $139. Actual account cash less that reserve is $879, but $740 of it belongs to T. The two available-cash figures answer different ownership questions.
| State | Actual cash | X shares | Actual equity | T equity | R equity | R open order and reserve |
|---|---|---|---|---|---|---|
| Initial, price 10 | 1000 | 40 | 1400 | 700 | 700 | None |
| W1 internal transfer, price 10 | 1000 | 40 | 1400 | 700 | 700 | None |
| W2 internal transfer, price 12 | 1000 | 40 | 1480 | 740 | 740 | External purchase not yet filled |
| W2 four filled, price 12 | 951 | 44 | 1479 | 740 | 739 | Six open; reserve 72; available 139 |
| W3 remainder cancellation confirmed, price 11 | 951 | 44 | 1435 | 740 | 695 | None; reserve released |
| W3 full sale under policy, price 11 | 1434 | 0 | 1434 | 740 | 694 | None; R cash 694 |
Reconcile with the input events and expected actual-account ledger. Two imported equity curves cannot reveal whether the remaining six ever filled. The order history supplies that missing fact.
Reject the specific invalid request
The insufficient-cash branch independently copies the state after W2's four-share fill. Confirm cancellation of the old six first, then ask R to buy 20 new shares at $12 with a new $1 order fee. Required cash is $241. R has $211, short $30. Do not borrow T's cash because the main screen shows $951. Reject the new order without a fee or position change.
A separate branch leaves the old six active with $72 reserved. R proposes a new twelve-share replacement order requiring $144 plus $1, or $145. Only $139 is uncommitted; old reserve plus the new requirement would be $217 against $211. The old order also lacks confirmed cancellation, duplicating the same strategy intention. A single apparently adequate balance cannot resolve either conflict.
Rejecting the new request leaves the existing six-share order and its $72 reserve intact. SEC guidance distinguishes a cancellation request or receipt from completed cancellation and calls for checking the actual state before resubmission.[1] Cash availability follows that terminal evidence, not the desired appearance of a clean screen.
The existing $72 reservation is affordable within R's $211. The new requests are invalid; do not misdiagnose the valid old order as insufficiently funded. Identifying the precise conflict prevents the next cash-release calculation from becoming wrong too.
W3: suspend the strategy without deleting its history
At W3's $11 price, R has a fault. The predeclared policy first requires terminal confirmation that the six-share remainder is canceled, then suspends R and sells its 44 shares to cash. Do not temporarily reassign that budget to T. Before the sale, cash of $951 plus 44 shares at $11 gives equity $1,435; R's portion is $695.
The exercise expressly permits all 44 to sell at $11. Proceeds are $484, with a new order fee of $1. R's cash becomes $211 plus $484 minus $1, or $694. Actual cash becomes $1,434. The policy includes a disposal rule and given executable conditions. A disable button does not itself make holdings disappear.
Recovery needs data-source, tradability, open-order, holdings, cash, fee, and permission checks, with reviewer identity and evidence recorded. Without them, remain suspended rather than restarting because X rebounds. Permanent retirement also preserves rules, failures, and reasons. Removing R from an old chart would not show the original portfolio's history.
FINRA's institutional guidance discusses rapid disabling, version records, independent testing, monitoring, and reconciliation.[2] We use those concepts to organize checks. C10 supplies its own internal allocations, fees, and suspension rules; neither the guidance nor this paper exercise constitutes actual RUN acceptance.
Reconcile net contributions without charging fees twice
T grows from $700 to $740, contributing $40 net. R ends at $694, contributing negative $6. Initial $1,400 plus $40 minus $6 equals $1,434, with no residual. Internal cash transfers are not external contributions available to fill a discrepancy.
Break the bridge down another way. From W1 to W2, the original 40 shares gain $2 each, producing $80: $40 per strategy while each owns 20. From W2 to W3, R actually holds 44 shares and loses $1 each, or $44. Its gross price contribution is $40 minus $44, or negative $4; its two fees total $2, giving negative $6 net.
Thus the account gains $80, loses $44, and pays $2: $34 net. Either sum net contributions of $40 and negative $6, or gross contributions of $40 and negative $4 with zero cash return and negative $2 fees. Summing net contributions and then deducting $2 again duplicates the fees.
When moving from independent research ledgers to netted execution, identify changed capital, ownership, actual fills, and cost treatment. Do not add two already-net return histories and invent an additional charge with the same economic meaning.
Rebuild portfolio metrics from the actual account. On the package's full valuation grid, equity reaches $1,480 before falling to $1,434. Cumulative return is 34 divided by 1,400, about 2.4286%. Maximum grid-observed drawdown is 46 divided by 1,480, about 3.1081%. Sampling only post-fill balances would omit the $1,480 peak; state the grid.
These windows have no equal calendar durations suitable for annualization. Do not force a CAGR or Sharpe from them. C10-B has its own equal-period comparison in G91. Averaging strategy Sharpes, drawdowns, or annualized returns cannot reconstruct the portfolio's different cash, timing, cost, and risk path.
A pause leaves existing risk in place
The joint-stress branch separately copies the $1,479 post-W2 state. First confirm the six remaining shares canceled without additional fills. X's supplied valuation falls to $8 and cannot be sold; both strategies block new risk.
T still holds $740 cash. R holds $211 plus 44 shares worth $352, totaling $563. Actual equity is $951 plus $352, or $1,303. The $176 decline from the branch's $1,479 start equals 44 shares losing $4 each. No new buy order remains, but 44 old shares still carry risk.
The $1,303 is a supplied valuation, not a promise of withdrawable sale proceeds. Do not describe vanished liquidity while silently selling at $8 to create $352 cash. A stopped order and a liquidated exposure are different account states.
Recheck a separate household limit
Use independent C8-92, denominated in renminbi, without converting the dollar example. Household A has RMB300,000 cash, RMB140,000 necessary reserves, and RMB160,000 potentially available. Existing stocks of RMB200,000 have a 40% stress loss, or RMB80,000. The combined loss budget is RMB120,000.
A combined RMB40,000 allocation to two candidate strategies has an assumed 50% joint loss, or RMB20,000. Adding existing stress loss gives RMB100,000, passing this supplied household screen. That is not live approval. This variant uses G74's base budget. Applying G75's separate policy of retaining at least RMB10,000 headroom would require an additional check rather than exchanging policy versions silently.
Now necessary care spending rises by RMB30,000 and the joint loss budget falls to RMB90,000. Available cash becomes RMB130,000. After the existing RMB80,000 stress loss, only RMB10,000 of estimated-loss budget remains. At the given 50% condition, the combined strategy-capital ceiling is RMB20,000.
The previous RMB40,000 plan fails despite fitting the cash balance. RMB20,000 remains a scenario candidate, not insurance against a larger actual loss. Recalculate both budgets and orders from the changed total; do not let each strategy independently claim the entire RMB20,000.
Change one order after confirmed cancellation
Explain why W1's internal ten-share transfer adds neither market turnover nor portfolio profit. Then revisit the insufficient-cash branch. The old six-share order has been confirmed canceled, R still has $211, and the new request is 17 shares at $12, plus the first-fill $1 fee. First assess only cash, without borrowing T's money. If the exercise additionally permits a complete fill, calculate R and actual account cash, shares, and equity.
Reference answers · reveal
Answer guide: The requirement is $204 plus $1, or $205, within R's $211. The cash screen passes, without automatically passing targets, operation, or other constraints. Under the separately given full fill, R has $6 cash and 61 shares, worth $738 at $12. T remains at $740 cash. The actual account has $746 cash and 61 shares, totaling $1,478, one fee below the branch's $1,479 start.
Do not retain the old $72 reservation: cancellation was confirmed first. Without that confirmation, this answer's conditions would not hold. The variant is independent of the main W3 path and does not overwrite the package. For W1, actual total shares and cash stay unchanged; virtual ownership creates no fill or new value.
Save the T21 unified-account archive
Keep initial actual and virtual ledgers, signals and targets, internal transfers, external order identifiers and states, each actual fill and first-fill fee, open-order reserves, cash, equity, and contribution bridges. Record the five event types, joint stress, household-limit change, paused-budget destination, and recovery evidence. T20 separately preserves comparisons and the trial budget.
Hand-calculate W1 and W2 before requesting matching tool fields. Verify that strategy shares sum to actual shares, cash is reserved only once, and contribution and fee bridges have zero residual. An external table can supplement a tool only when linked to observable original receipts. If evidence remains unavailable, mark the operating capability blocked; an equity chart cannot pass it.
Return strategy explanations to account facts
Ask who wants what, what actually occurred, and who owns the resulting cash and risk. Opposing intentions can reduce external trading but cannot remove internal records. Partial fills and suspension do not automatically extinguish open orders or old exposure.
Keep account facts and strategy explanations reconcilable step by step. They support a decision to continue simulation, reduce, suspend, or archive without rewriting what happened.
References
- SEC Investor.gov: Online Investing. Confirm execution and actual cancellation before resubmitting.
- FINRA: Regulatory Notice 15-09, March 26, 2015, sections II–IV. Institutional guidance on versions, disabling, testing, monitoring, and reconciliation; not the source of this case's internal funding rules.
Sources inspected October 30, 2026. AI-assisted draft; independent AI full-text and bilingual review is complete. Human financial review and target-reader testing have not been performed. C10, C8-92, and the order variant are synthetic and separately identified. No allocation recommendation or real operational acceptance is supplied.