Why is AT PnL different from M2M?

The short answer

You may see a few different profit or loss numbers on the Positions screen: M2M, PnL, AT PnL and AT PnL Live. They can differ because they come from different places.

• M2M and PnL come straight from your broker. They are whatever the broker reports.
• AT PnL is profit or loss that our own system calculates, using live prices.
• AT PnL Live is a live estimate that keeps ticking with the market. It uses a different method again, so it too can differ a little.

Why we calculate our own value

We calculate AT PnL because the profit or loss we receive from some brokers has problems:

• Some brokers send delayed PnL.
• Some brokers do not send PnL in the position data at all.

So we work out our own value. To do this, our system uses:

• your position’s average buy price and average sell price,
• the overnight quantity carried from the previous day,
• the live price of the stock or derivative, and
• the fields and formula the broker provides for working out profit and loss.

Why the two can differ

Because AT PnL and the broker’s M2M are worked out in different ways, small differences are normal.

Sometimes the data the broker sends is not enough to match their figure exactly. This is more common for overnight derivative positions, where:

• the data the broker sends can be inaccurate or incomplete, or
• the broker does not publish the exact formula they use.

In those cases our calculated value can differ a little from the value on the broker’s own screen. The differences are usually small.

What to do if a value looks wrong

This calculation is still in BETA. If you see a profit or loss value that does not look right, please report it to us so we can check it and fix it. Share the account, the symbol, and what you expected — that helps us find the cause quickly.

You can reach us from the Contact page.

Related help

• Positions screen
• Summary screen
• Upstox: position data does not contain M2M & PnL values