diff --git a/app/models/family.rb b/app/models/family.rb
index 2145b062..a0c76974 100644
--- a/app/models/family.rb
+++ b/app/models/family.rb
@@ -115,7 +115,7 @@ class Family < ApplicationRecord
 
     {
       asset_series: TimeSeries.new(result.map { |r| { date: r.date, value: Money.new(r.assets, r.currency) } }),
-      liability_series: TimeSeries.new(result.map { |r| { date: r.date, value: Money.new(r.liabilities, r.currency) } }),
+      liability_series: TimeSeries.new(result.map { |r| { date: r.date, value: Money.new(r.liabilities, r.currency) } }, favorable_direction: "down"),
       net_worth_series: TimeSeries.new(result.map { |r| { date: r.date, value: Money.new(r.net_worth, r.currency) } })
     }
   end