diff --git a/evaluation.py b/evaluation.py
index 178c9ad..e7a78ab 100644
--- a/evaluation.py
+++ b/evaluation.py
@@ -78,7 +78,7 @@ class Evaluation(sequence_ordered(), ModelSQL, ModelView):
         relation_name='cashbook_report.eval_line',
         origin='evaluation', target='category',
         states={
-            'invisible': Eval('dtype', '').in_(category_types),
+            'invisible': ~Eval('dtype', '').in_(category_types),
         }, depends=['dtype'])
 
     line_values = fields.One2Many(string='Line Values',
diff --git a/investment.py b/investment.py
index ace4e73..fcd53ed 100644
--- a/investment.py
+++ b/investment.py
@@ -49,12 +49,15 @@ class InvestmentLine(metaclass=PoolMeta):
         amount = Decimal('0.0')
 
         if len(books) > 0:
-            value = sum([x.current_value_ref for x in books])
-            amount = sum([x.balance_ref for x in books])
-        if amount != Decimal('0.0'):
-            return (
-                    Decimal('100.0') * value / amount - Decimal('100.0')
-                ).quantize(Decimal(str(1 / 10 ** self.currency_digits)))
+            value = sum([x.current_value_ref for x in books
+                if (x.current_value_ref is not None) and (x.feature == 'asset')])
+            amount = sum([x.balance_ref for x in books
+                if (x.balance_ref is not None) and (x.feature == 'asset')])
+            if amount != Decimal('0.0'):
+                return self.convert_to_evalcurrency(
+                        books[0].company.currency,
+                        Decimal('100.0') * value / amount - Decimal('100.0'),
+                    )
         return Decimal('0.0')
 
     def get_value_category_glvalue(self):
@@ -72,7 +75,15 @@ class InvestmentLine(metaclass=PoolMeta):
             ])
         result = Decimal('0.0')
         if len(books) > 0:
-            result = sum([x.current_value_ref for x in books])
+            for book in books:
+                if book.feature == 'asset':
+                    if book.current_value_ref is not None:
+                        result += book.current_value_ref
+                else :
+                    if book.balance_ref is not None:
+                        result += book.balance_ref
+            return self.convert_to_evalcurrency(
+                    books[0].company.currency, result)
         return result
 
     def get_value_category_gldiff(self):
@@ -90,7 +101,12 @@ class InvestmentLine(metaclass=PoolMeta):
             ])
         result = Decimal('0.0')
         if len(books) > 0:
-            result = sum([x.current_value_ref - x.balance_ref for x in books])
+            result = sum([x.current_value_ref - x.balance_ref for x in books
+                if (x.current_value_ref is not None) and \
+                    (x.balance_ref is not None) and \
+                    (x.feature == 'asset')])
+            result = self.convert_to_evalcurrency(
+                    books[0].company.currency, result)
         return result
 
     def get_value_cashbooks_gldiff(self):
@@ -100,12 +116,9 @@ class InvestmentLine(metaclass=PoolMeta):
 
         if self.cashbook:
             if self.cashbook.feature == 'asset':
-                exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
-                return Currency.compute(
+                return self.convert_to_evalcurrency(
                         self.cashbook.currency,
-                        self.cashbook.diff_amount,
-                        self.eval_currency,
-                    ).quantize(exp)
+                        self.cashbook.diff_amount)
 
     def get_value_cashbooks_glvalue(self):
         """ current value of cashbooks
@@ -114,12 +127,9 @@ class InvestmentLine(metaclass=PoolMeta):
 
         if self.cashbook:
             if self.cashbook.feature == 'asset':
-                exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
-                return Currency.compute(
+                return self.convert_to_evalcurrency(
                         self.cashbook.currency,
-                        self.cashbook.current_value,
-                        self.eval_currency,
-                    ).quantize(exp)
+                        self.cashbook.current_value)
 
     def get_value_cashbooks_glperc(self):
         """ percent of profit/loss of cashbooks
diff --git a/line.py b/line.py
index a44b266..eb9a517 100644
--- a/line.py
+++ b/line.py
@@ -128,18 +128,26 @@ class EvaluationLine(ModelSQL, ModelView):
 
         # otherwise use rec_name of linked record
         if self.eval_dtype:
+            dtype_sel = {'types': 'dtype', 'currencies': 'currency'}
+            dtype_sel.update({x:'cashbook' for x in cashbook_types})
+            dtype_sel.update({x:'category' for x in category_types})
+
             return getattr(
-                getattr(self, {
-                    'cashbooks': 'cashbook',
-                    'cashbooks_gldiff': 'cashbook',
-                    'cashbooks_glperc': 'cashbook',
-                    'cashbooks_glvalue': 'cashbook',
-                    'categories': 'category',
-                    'types': 'dtype',
-                    'currencies': 'currency',
-                }[self.eval_dtype], None),
+                getattr(self, dtype_sel[self.eval_dtype], None),
                 'rec_name', None)
 
+    def convert_to_evalcurrency(self, from_currency, amount):
+        """ convert amount to current evaluation-currency
+        """
+        Currency = Pool().get('currency.currency')
+
+        exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
+        return Currency.compute(
+                from_currency,
+                amount,
+                self.eval_currency,
+            ).quantize(exp)
+
     @classmethod
     def validate(cls, records):
         """ check parent record
@@ -202,13 +210,9 @@ class EvaluationLine(ModelSQL, ModelView):
                 (id_currency, bal1) = balance
 
                 if bal1 is not None:
-                    total_amount += Currency.compute(
-                            Currency(id_currency),
-                            bal1,
-                            self.eval_currency,
-                        )
-        exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
-        return total_amount.quantize(exp)
+                    total_amount += self.convert_to_evalcurrency(
+                            Currency(id_currency), bal1)
+        return total_amount
 
     def get_value_cashbooks(self):
         """ balance of cashbooks
@@ -216,12 +220,10 @@ class EvaluationLine(ModelSQL, ModelView):
         Currency = Pool().get('currency.currency')
 
         if self.cashbook:
-            exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
-            return Currency.compute(
+            return self.convert_to_evalcurrency(
                     self.cashbook.currency,
                     self.cashbook.balance,
-                    self.eval_currency,
-                ).quantize(exp)
+                )
 
     def get_value_categories(self):
         """ get balance of bookings in categories