US500 Lot Size Calculator
On a $10,000.00 account, risking 2% ($200.00) with a stop of 20 points, US500 sizes to 10.00 lots. One point on 1.00 lot is $1.00. The loss at that rounded size is $200.00, with no spread and no commission.
US500 uses the same assumed 1-per-lot model as US30 and NAS100, $1.00 per point on 1.00 lot. BlackBull's contract specifications list the S&P 500 cash index at 1 per lot. If your contract is larger, divide this page's lot by that size. Copying the printed lot onto a bigger contract oversizes the cash risk. The index moves fewer points, so the grid uses 8, 16, 32 point stops. The minimum lot is 0.10.
US500 contract: 1 units per 1.00 lot. This size is an assumption and differs by platform. 1 point = 1. A 0.01 lot is $0.01 per point, a 0.10 lot is $0.10, and 1.00 lot is $1.00. A 0.01 lot is under the 0.10 minimum, so the 0.01 value is math only. The quote currency is USD, so the 2026-10-15 bundled rates are not applied. Minimum lot 0.10, step 0.10. The lot rounds down, so the loss at the stop stays at or under the risk when spread and commission are left at zero.
The risk table for US500 uses stops of 8, 16, 32 points. On $10,000.00 at 2% those three stops size 25.00 lots, $200.00 at the stop; 12.50 lots, $200.00 at the stop; 6.20 lots, $198.40 at the stop.
| Spec | US500 |
|---|---|
| Contract size | 1 units per 1.00 lot. This size is an assumption and differs by platform. |
| Point definition | 1 point = 1 |
| Value of 0.01 lot per point | $0.01 |
| Value of 0.10 lot per point | $0.10 |
| Value of 1.00 lot per point | $1.00 |
| Minimum lot | 0.10 |
| Lot step | 0.10 |
| USD rate used for this table | Quote currency is USD. Bundled rates dated 2026-10-15 are not applied. |
| US500 | Account | Risk | 8 points | 16 points | 32 points |
|---|---|---|---|---|---|
| US500 | $5,000.00 | 0.5% ($25.00) | 3.10 lots, $24.80 at the stop | 1.50 lots, $24.00 at the stop | 0.70 lots, $22.40 at the stop |
| US500 | $5,000.00 | 1% ($50.00) | 6.20 lots, $49.60 at the stop | 3.10 lots, $49.60 at the stop | 1.50 lots, $48.00 at the stop |
| US500 | $5,000.00 | 2% ($100.00) | 12.50 lots, $100.00 at the stop | 6.20 lots, $99.20 at the stop | 3.10 lots, $99.20 at the stop |
| US500 | $10,000.00 | 0.5% ($50.00) | 6.20 lots, $49.60 at the stop | 3.10 lots, $49.60 at the stop | 1.50 lots, $48.00 at the stop |
| US500 | $10,000.00 | 1% ($100.00) | 12.50 lots, $100.00 at the stop | 6.20 lots, $99.20 at the stop | 3.10 lots, $99.20 at the stop |
| US500 | $10,000.00 | 2% ($200.00) | 25.00 lots, $200.00 at the stop | 12.50 lots, $200.00 at the stop | 6.20 lots, $198.40 at the stop |
| US500 | $25,000.00 | 0.5% ($125.00) | 15.60 lots, $124.80 at the stop | 7.80 lots, $124.80 at the stop | 3.90 lots, $124.80 at the stop |
| US500 | $25,000.00 | 1% ($250.00) | 31.20 lots, $249.60 at the stop | 15.60 lots, $249.60 at the stop | 7.80 lots, $249.60 at the stop |
| US500 | $25,000.00 | 2% ($500.00) | 62.50 lots, $500.00 at the stop | 31.20 lots, $499.20 at the stop | 15.60 lots, $499.20 at the stop |
| US500 | $50,000.00 | 0.5% ($250.00) | 31.20 lots, $249.60 at the stop | 15.60 lots, $249.60 at the stop | 7.80 lots, $249.60 at the stop |
| US500 | $50,000.00 | 1% ($500.00) | 62.50 lots, $500.00 at the stop | 31.20 lots, $499.20 at the stop | 15.60 lots, $499.20 at the stop |
| US500 | $50,000.00 | 2% ($1,000.00) | 125.00 lots, $1,000.00 at the stop | 62.50 lots, $1,000.00 at the stop | 31.20 lots, $998.40 at the stop |
| US500 | $100,000.00 | 0.5% ($500.00) | 62.50 lots, $500.00 at the stop | 31.20 lots, $499.20 at the stop | 15.60 lots, $499.20 at the stop |
| US500 | $100,000.00 | 1% ($1,000.00) | 125.00 lots, $1,000.00 at the stop | 62.50 lots, $1,000.00 at the stop | 31.20 lots, $998.40 at the stop |
| US500 | $100,000.00 | 2% ($2,000.00) | 250.00 lots, $2,000.00 at the stop | 125.00 lots, $2,000.00 at the stop | 62.50 lots, $2,000.00 at the stop |
Questions
What is the US500 lot size?
10.00 lots on $10,000.00 at 2% with a 20 point stop, assuming $1.00 per point on 1.00 lot.
Why are US500 stops shorter than US30 stops?
The index moves fewer points. This grid uses 8, 16, 32 points. US30 uses 25, 50 and 100.
What contract size is assumed?
1 per lot. Platforms also use 10 and other dollar-per-point sizes. The minimum lot is 0.10.
Does US500 share a pip with forex?
No. The stop unit is a point, a 1.0 move in the index.