# How to Reconcile Molecule with your FCM Statements

Most people using Molecule focus on Mark-to-Market, which is not quite what you see on your bank statements every day. This article helps you decipher your bank statement (assuming your bank uses [GMI](https://www.sungard.com/Regions/Australia/solutions/post-trade-processing/stream/stream-derivatives/stream-gmi) or something similar), and compare it to Molecule's numbers.

#### Supplies

The numbers you're looking for on your FCM statement (usually at the end of the first section, in a summary table):

1. Market Variance
2. Today's Commissions & Fees
3. Option Premiums (for trades that are still alive)

The numbers you're looking for in Molecule (available on position screens, PNL extract, and many custom reports):

1. MTM Change 
2. PNL Change

These numbers, calculated by Molecule, are denoted by asterisks in the below comparisons.

#### Validating MTM Change

Comparing Molecule's calculation for MTM Change with the FCM is straightforward.

`*MTM Change* ≈ Market Variance - (Sum of Today's Commissions & Fees)`

#### Validating PNL Change

PNL Change is essentially MTM Change, with the addition of fees. If Molecule is not generating/storing fees for you, here's the comparison:

`*PNL Change* ≈ Market Variance - [Commissions/Fees] - [Option Premiums Paid for Living Trades]`

Many users have fees automatically applied to their trades in Molecule, in which case the comparison will be slightly different:

`*PNL Change* ≈ Market Variance - [Option Premiums Paid for Living Trades]`

#### Getting to Cash

Once you've validated that MTM Change and Market Variance get along, you can go back into net liquidating value. Roughly, 

`Prior Net Liquidating Value + Market Variance ≈ Current Net Liquidating Value`