def PortfolioView(request):
template_name = 'portfolio/portfolio.html'

if request.method == "GET":

    id_list = []
    queryset = PortfolioModel.objects.filter(insert_type='position')
    for obj in queryset:
        id_list.append(obj.trade_id)
        # No need to dive into details here, but this simply creates a list
        # of all available unique trade_id's in the model (there is only
        # one object with insert_type='position' for each 'trade_id')

    portfolio_object = PortfoliopositionFormset(queryset=PortfolioModel.objects.all())

    context = {
        'portfolio_object': portfolio_object,
        'id_list': id_list,
    }

    return render(request, template_name, context)

elif request.method == "POST":

    portfolio_object = PortfoliopositionFormset(request.POST)

    if portfolio_object.is_valid():

        for form in portfolio_object:
            form.save()

        return HttpResponseRedirect('/portfolio/')

{% for id in id_list %}
    <form method="POST">
    {% csrf_token %}
        <table>
           {{ portfolio_object.management_form }}
            {% for object in portfolio_object %}
                {% if object.trade_id.value == id %}
                    <tr>
                    <td>{{ object.field_1 }}</td>
                    <td>{{ object.field_2 }}</td>
                    </tr>
                {% endif %}
            {% endfor %}
        </table>
        <button type="submit">Close position</button>
    </form>
{% endfor %}