Forms :: Show Records With One Common Field Value

I'm a beginner trying to build a simple database for work. I'm trying to track the performance of bonds from month to month, in this case January-April. Each bond has a serial number called Serial_ID, but we wanted to create a record for each month we own the bond, so we created a primary key combining Serial_ID and start date called Serial_Start_Date. So if we own one bond, its January record would have a primary key of "4553123A 2013-01-01" and February would be "4553123A 2013-02-01". I created a form that allows a user to select one individual month's bond and display that month's return. However, I'm struggling to find a way to create a form that allows me to just select the Serial_ID and display the four month's records. Right now there is only one table in the database.