Django Question: best way to approach highly conditional page output

django question 1

I have this framed out and working but I wanted to post this question to see how more experienced Django developers would approach this problem.  So to use a simple domain
that everyone can understand, I will frame this as a simple reporting page on a web site where an investor wants to view different classes of assets (stocks, bonds, cds,
etc). I only show three instrument types but like any project it could grow to many more over the project life cycle.

Given the following models . . .

class Investor(models.Model):
	first = models.CharField()
	blah = models.CharField()
	blan = models.CharField()

class Instrument(models.Model):
	STOCK = 'Stock' 
	BOND = 'Bond' 
	CD = 'CD'
	INST_TYPE_CHOICES = ( (STOCK,'Stock'),(Bond,'Bond'),)
	investor = models.ForeignKey(Investor)
	instrument_type = models.CharField(max_length='5',choices=INST_TYPE_CHOICES,default=STOCK)
	name = . . . 


I want the web page to look like this . . . 

John Brown
123 Clueless Avenue
Boulder, CO 80303


Stocks
=======
	IBM
	APPL
	GOOG

Bonds
=======
	Boulder, CO 10 year
	US Treasury 5 year

CDs
=======	
	Wells Fargo 6 Month
	Goldman Sachs Select 2 Year



The complication is that the page is highly conditional. Sometimes all three types (Stocks, Bonds, CDs) will be present, other times, 
just one or two types; it's conditional and all possibilities will occur.

MY QUESTION: What is the best way to implement the view/template? With "best" putting a premium on performance, maintainence, general elegance.

I know I could attempt Inclusion Tags, but in my newbness, I am leaning toward making a series of model methods on the Investor class (has_bonds, has_stocks, etc) that
lets me implement a template that looks like this.  The drawback is a new model method must get added to the code with every new intrstument type


		{% if theinvestor.has_bonds %}
			<b>Bonds</b>
				{% for bond in bond_list %}
					{% if bond.doc_type=="Bond" %}  
				  		<li>{ bond.name }}</li>
				  	{% endif %}	
				{% endfor %}
		{% endif %}


How would you more experienced Django devs approach this?

After messing around, I decided to simply return the different classes as individual querysets in the view and pass them in the context to the template. I will keep it simple like that unless performance becomes an issue.