How to Read BPS P&L on Your Broker: A Line-by-Line Breakdown
Most brokers — including Firstrade — show each leg of a Bull Put Spread separately, with opposite signs, and no combined total. Here's exactly how to add them up and know what you're actually making.
Bull Put Spread is a two-leg trade. But most brokers — including Firstrade — don't show you a combined P&L for the whole spread.
What you actually see looks like this:
| Contract | Qty | Cost Basis | Market Value | P&L |
|---|---|---|---|---|
| SPY Mar $500 Put | -1 | -$300 | -$120 | +$180 |
| SPY Mar $495 Put | +1 | +$200 | +$80 | -$120 |
Two rows. Opposite signs. No total.
Are you up $180? Down $120? Something else?
What Does Each Line in Your Broker Actually Mean?
Row 1: The Sell Put (your short leg)
Qty -1: You're short — hence negative.
Cost basis -$300: When you opened, you received $3.00 in premium ($300). Accounting treats this as a liability — someone paid you $300, and you owe them a future obligation. So it shows as -$300.
Market value -$120: Buying this contract back right now would cost $1.20 ($120). Your liability has shrunk from $300 to $120.
P&L +$180: Your liability shrank by $180. That's the profit on this leg.
Row 2: The Buy Put (your long leg)
Qty +1: You're long — positive.
Cost basis +$200: You paid $2.00 ($200) for this put at entry.
Market value +$80: This contract is currently worth $0.80 ($80).
P&L -$120: You paid $200, it's now worth $80 — down $120 on this leg.
How Do You Add the Two Legs Together?
Total BPS P&L = Row 1 P&L + Row 2 P&L
+$180 + (−$120) = +$60
Your full position is up $60 — which is 60% of your $100 max profit.
A Second Way to Verify
You can also check with the "what I collected vs. what it costs to close" formula:
Net credit at open = $300 − $200 = $100
Current close cost = $120 − $80 = $40
Current profit = $100 − $40 = $60 ✓
Same answer. Use whichever framing clicks better for you.
The Scenario That Fools People
Stock drops a little. You open the positions page. The Sell Put row now shows P&L of -$50. The Buy Put row shows +$30.
Your first reaction: "I'm losing $50."
Add them: -$50 + $30 = -$20. Your whole position is only down $20, not $50.
Looking at just one row will always mislead you. The short leg always shows the most dramatic number — because that's the direction your liability moves.
The Routine
Every time you check your BPS position:
- Find your two legs (same underlying, same expiration)
- Add the two P&L numbers together
- That's your actual spread P&L
Or use the formula: original net credit received − current cost to close.
Why Brokers Don't Show a Combined View
This isn't a broker bug — it's a design choice. Most brokerage platforms track each contract as an independent position record. For professional traders running complex books, this makes sense. For someone running BPS on a few names, it creates unnecessary mental overhead.
Options-focused platforms like Thinkorswim (TD Ameritrade) and Tastytrade typically display multi-leg strategies as a single combined position with one P&L line. But not every broker does this.
What BPS Tracker Shows Instead
The two confusing rows you see in your broker become one number in BPS Tracker:
SPY Mar $500/$495 BPS
Opened: $1.00 | Current: $0.40 | Profit: 60% | DTE: 22
No mental addition. No looking up what you collected at entry. Enter once, track in real time.
Once you know the two-row addition logic, your broker display stops being confusing.
The rule is simple: your BPS P&L = Sell Put P&L + Buy Put P&L. Both rows together tell the truth. Either one alone is misleading.
Frequently Asked Questions
- Why does my broker show two separate rows for a Bull Put Spread?
- Most brokers track each options contract as an independent position record. Your short put shows as a negative quantity and your long put as positive — each with its own cost basis, market value, and P&L. There is no combined total shown.
- How do I calculate the total P&L of a Bull Put Spread on my broker?
- Add the P&L from both rows together: short put P&L + long put P&L = total BPS P&L. Alternatively: net credit received at open minus current cost to close. On a trade where you collected $100 and it now costs $40 to close, your profit is $60 — 60% of maximum.
- Why does my Sell Put row show a large loss even when my BPS is profitable?
- The short leg shows a loss when the put you sold has risen in value — but this is always partially offset by the long put also losing value. Looking at one row alone always misleads. Only the sum of both rows tells the truth.
- How does BPS Tracker simplify options P&L tracking?
- BPS Tracker combines both legs into one number — showing opened credit, current value, profit percentage, and DTE in a single line. You enter the trade once and track it in real time without manual addition.
Ready to track your BPS positions?
BPS Tracker gives you real-time Greeks, IV Rank, and AI analysis — trade with data.
Download on App Store — Free