## Why
### Problem
The Indexa Capital dashboard shows +€11,339.01 profit for the Index
funds account, but our app shows +€9,680.43 — a €1,658.58 discrepancy.
The invested amount (and therefore the profit) is wrong.
### Root Cause
`calculateInvestedAmount()` used `instruments_cost + cash_amount` to
determine how much was invested. However, `instruments_cost` is the
**cost basis of currently held fund shares**, not the actual money
deposited. When Indexa rebalances portfolios, they sell shares
(realizing gains) and buy new ones at a higher cost basis. This inflates
`instruments_cost` over time without any new deposits, making the
"invested" figure too high and profit too low.
## What
### Changes
- Use `net_amounts` from the Indexa Capital API response instead of
`instruments_cost + cash_amount`
- `net_amounts` is an object keyed by date (`YYYYMMDD` format), where
each value is the cumulative net investment (inflows - outflows -
tax_outflows), matching Indexa Capital's own "investment" figure
- Keep `total_amount - return` as a fallback when `net_amounts` is
unavailable
- Return `null` when neither data source is available
### Concrete numbers (Index funds account, 2026-02-24)
| | Old (wrong) | New (correct) |
|---|---|---|
| Invested | €48,081.67 | €46,423.09 |
| Profit | €9,680.43 | €11,339.01 |
## Verification
### Tests
- Updated `stores invested_amount from net_amounts data` — verifies
invested_amount is sourced from `net_amounts`, not `instruments_cost +
cash_amount`
- Updated `stores null invested_amount when net_amounts is missing` —
verifies graceful null when API lacks `net_amounts`
- Updated `falls back to total_amount minus return when net_amounts is
missing` — verifies fallback path
- All 11 balance sync tests pass, all 23 SyncBankingConnectionJob tests
pass
## Summary
- Subsequent syncs (every 6h) now only process recent data instead of
re-syncing full history, reducing unnecessary API calls and database
writes
- Full sync still runs automatically on first connection and can be
forced anytime with `banking:sync --full`
- Centralizes `isFirstSync` logic in `SyncBankingConnectionJob` and
propagates the `fullSync` flag through the entire chain: Command →
`SyncAllBankingConnectionsJob` → `SyncBankingConnectionJob` → provider
services
## Changes by provider
- **Indexa Capital**: Skips portfolio entries older than the last
recorded balance date on incremental syncs (the API doesn't support date
filtering, so filtering is done client-side)
- **Binance**: Reuses stored `invested_amount` from the database on
subsequent syncs instead of fetching up to 2 years of deposit/withdrawal
history in 90-day windows
- **EnableBanking / Bitpanda**: Already minimal — no changes needed
## Testing
- Fixed 6 existing Binance tests to pass `isFirstSync: true` for
invested amount calculation
- Added 7 new tests covering incremental sync behavior, full sync
override, and `--full` flag propagation
## Why
Investment and retirement accounts show balance over time, but there's
no way to see how much money was actually put in versus how much is
current value. Users can't tell at a glance whether their investments
are up or down.
## What
Adds an "invested amount" tracking system across the full stack:
**Backend**
- New `invested_amount` column on `account_balances` (nullable
bigInteger, cents, per-date)
- Auto-sync from providers: Indexa Capital (instruments_cost +
cash_amount), Bitpanda (fiat deposit/withdrawal history), Binance
(90-day windowed deposit/withdrawal with crypto→fiat conversion)
- Manual input support via Update Balance dialog
- Historical invested amount data in all balance evolution APIs (net
worth, account detail)
**Frontend**
- Dashed line on sparkline charts (dashboard + accounts page) showing
per-point historical invested amount alongside balance
- Dashed line on account detail charts (daily AreaChart + monthly
ComposedChart)
- Tooltips with labeled rows: Balance, Invested, Gain/loss (color-coded)
- Invested amount column in balances history modal
- Invested amount field in balance import wizard (CSV mapping)
- Demo account seeder updated with invested amount data
## Screenshots
<img width="1301" height="750" alt="image"
src="https://github.com/user-attachments/assets/0f05ecd0-8b98-47b4-9fa4-027f0311e3bb"
/>
<img width="744" height="374" alt="image"
src="https://github.com/user-attachments/assets/c4daa816-dee0-4f94-957f-317a13bc80d5"
/>
<img width="1267" height="738" alt="image"
src="https://github.com/user-attachments/assets/21df350c-6954-4ff5-8b3c-b858df3a8b3a"
/>
<img width="1301" height="828" alt="image"
src="https://github.com/user-attachments/assets/16f5f021-a926-4e8e-a999-c4ca32d1ea3d"
/>
<img width="1274" height="845" alt="image"
src="https://github.com/user-attachments/assets/62f2dfc0-04f0-4bdb-b072-cf7cd1be77d3"
/>
## Summary
- Allow users to connect their Indexa Capital (Spanish robo-advisor)
account via API token
- Adds "Indexa Capital" option when selecting Spain in the bank
connection dialog
- Token-based auth flow: user enters API token (instead of OAuth
redirect), validated against Indexa API, stored encrypted
- Syncs portfolio balance only (no transactions) from the
`/accounts/{id}/performance` endpoint
- Accounts created as `Investment` type
- Reuses existing account mapping flow when the `account-mapping`
feature flag is active
- Disconnect flow skips session revocation for Indexa (no OAuth session
to revoke)
## New files
- `IndexaCapitalClient` — HTTP client for Indexa Capital API
(`X-AUTH-TOKEN`)
- `IndexaCapitalBalanceSyncService` — Syncs portfolio value into
`account_balances`
- `IndexaCapitalController` — Token validation + connection creation
- `ConnectIndexaCapitalRequest` — Form request validation
- Migration adding encrypted `api_token` column to `banking_connections`
## Test plan
- [x] 6 controller tests (connect, invalid token, mapping, feature flag,
validation, multi-account)
- [x] 4 balance sync tests (sync, update, skip, missing field)
- [x] 3 sync job tests (balance-only, no expire, no email for Indexa)
- [x] 1 disconnect test (no revokeSession for Indexa)
- [x] All 530 existing tests still pass
Víctor Falcón