Pyramiding
Plan your next additions. See how each tranche changes your average, exposure and downside.
How to use it For completed buys, enter actual shares. For planned tranches, enter a cash budget including purchase costs. Keep completed trades first, then set a portfolio reference and illustrative exit.
Average cost after all tranches
Including planned purchases and costs.
- Shares already owned
- 12,500
- Shares after all tranches
- 39,656
- Capital already deployed
- £2,500.00
- Additional planned spend
- £7,499.52
- Total capital / portfolio
- 20%
- Profit / loss at exit
- -£2,861.44
- P/L / portfolio reference
- -5.72%
- Unspent planned budget
- £0.48
Tranche-by-tranche breakdown
| Tranche | Shares | Spend (£) | Running average | Capital / portfolio |
|---|---|---|---|---|
| 1 · Bought | 12,500 | 2,500 | 20p | 5% |
| 2 · Planned | 10,416 | 2,499.84 | 21.8181p | 10% |
| 3 · Planned | 8,928 | 2,499.84 | 23.5513p | 15% |
| 4 · Planned | 7,812 | 2,499.84 | 25.2157p | 20% |
Allocation is based on purchase cost, not the current market value.
Why it matters
See what each additional purchase does to your average price and portfolio exposure.
Four £2,500 tranches at 20p, 24p, 28p and 32p buy 12,500, 10,416, 8,928 and 7,812 whole shares before costs. The actual spend is £9,999.52, not £10,000; 48p remains unspent.
How it's calculated
Running average (p) = cumulative spend ÷ cumulative shares × 100
P/L at exit = all shares × exit in £ − total spend − exit costs
The target allocation is a warning threshold, not an automatic order-size limit. Capital allocation uses total purchase cost divided by a fixed portfolio reference; it is not a live market-value weight.
Assumptions & limitations
Planning only: no orders are placed, and future purchases are not assumed to be completed. Costs must be entered manually. Exit prices, liquidity and future tranche fills are not guaranteed. Prices need not rise between rows, but non-rising additions are flagged. This tool does not model borrowing, cash flows between trades or changes in other holdings.