There is currently no way to track your personal portfolio as far as day to day performance for the individual investor within Google Finance. Many investors are asking for this information. Google has suggested that there will be future updates but has not commented on whether they plan to include a way for users to input specific data from their stock portfolio (i.e. shares owned and the price paid).
Prior to the launch, a spokeswoman stated that Google elected to make the changes to increase the global exposure of their Finance product. By integrating the function into Google's Search tool, it will allow the company to reach a larger audience that wants this information.
One workaround within the Google platform is to use Google Sheets.
Google Sheets allows you to populate individual fields within the spreadsheet with information pulled directly from Google Finance. Once you add this information it will automatically refresh from the latest information available in Google Finance. As a user, you would have to input information from your specific portfolio, but once you have input the data, the spreadsheet will continually update the calculations on your portfolio’s performance based on the latest information in Google Finance. One of the interesting things about using Google Sheets is that this is a way for you to get additional information about the stock that you don’t get on Google Finance. For example, you can find the number of outstanding shares and the average daily trading volume.