diff --git a/tests/test_finance.py b/tests/test_finance.py
new file mode 100644
index 00000000..b150f630
--- /dev/null
+++ b/tests/test_finance.py
@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+import pytest
+
+import validators
+
+#good values
+@pytest.mark.parametrize('value', [
+    '912796X38',
+    '912796X20',
+    '912796x20'
+])
+def test_returns_true_on_valid_cusip(value):
+    assert validators.cusip(value)
+
+#bad values 
+@pytest.mark.parametrize('value', [
+    '912796T67',
+    '912796T68',
+    'XCVF',
+    '00^^^1234',
+    '1234567890'
+])
+def test_returns_failed_validation_on_invalid_cusip(value):
+    result = validators.cusip(value)
+    assert isinstance(result, validators.ValidationFailure)
+
+
+
+#good values
+@pytest.mark.parametrize('value', [
+    '0263494',
+    '0540528',
+    'B000009'
+])
+def test_returns_true_on_valid_sedol(value):
+    assert validators.sedol(value)
+
+#bad values 
+@pytest.mark.parametrize('value', [
+    '0540526',
+    'XCVF',
+    '00^^^1234',
+    'A000009'
+])
+def test_returns_failed_validation_on_invalid_sedol(value):
+    result = validators.sedol(value)
+    assert isinstance(result, validators.ValidationFailure)
+
+
+
+
+#good values
+@pytest.mark.parametrize('value', [
+    'US0004026250',
+    'JP000K0VF054',
+    'US0378331005'
+])
+def test_returns_true_on_valid_isin(value):
+    assert validators.isin(value)
+
+#bad values 
+@pytest.mark.parametrize('value', [
+    '010378331005'
+    'XCVF',
+    '00^^^1234',
+    'A000009'
+])
+def test_returns_failed_validation_on_invalid_isin(value):
+    result = validators.isin(value)
+    assert isinstance(result, validators.ValidationFailure)
+ 
\ No newline at end of file
diff --git a/validators/__init__.py b/validators/__init__.py
index f623e12f..f7c2fff8 100644
--- a/validators/__init__.py
+++ b/validators/__init__.py
@@ -24,12 +24,14 @@
 from .url import url
 from .utils import ValidationFailure, validator
 from .uuid import uuid
+from .finance import ( cusip, sedol, isin )
 
 __all__ = ('between', 'domain', 'email', 'Max', 'Min', 'md5', 'sha1', 'sha224',
            'sha256', 'sha512', 'fi_business_id', 'fi_ssn', 'iban', 'ipv4',
            'ipv4_cidr', 'ipv6', 'ipv6_cidr', 'length', 'mac_address', 'slug',
            'truthy', 'url', 'ValidationFailure', 'validator', 'uuid',
            'card_number', 'visa', 'mastercard', 'amex', 'unionpay', 'diners',
-           'jcb', 'discover', 'btc_address')
+           'jcb', 'discover', 'btc_address', 'cusip', 'sedol', 'isin')
 
 __version__ = '0.20.0'
+ 
\ No newline at end of file
diff --git a/validators/finance.py b/validators/finance.py
new file mode 100644
index 00000000..e0f6bc0e
--- /dev/null
+++ b/validators/finance.py
@@ -0,0 +1,145 @@
+
+
+from .utils import validator
+
+def cusipChecksum( cusip ) :
+
+    check = 0 
+    val = None  # just to be extra safe - should not be needed but ...
+
+    for digitIndex in range(9) :
+        c = cusip[digitIndex]
+        if c >= '0' and c <= '9' :
+            val = ord(c) - ord('0')
+        elif c >= 'A' and c <= 'Z' :
+            val = 10 + ord(c) - ord('A')
+        elif c >= 'a' and c <= 'z' :
+            val = 10 + ord(c) - ord('a')
+        elif c == '*' :
+            val = 36
+        elif c == '@' :
+            val = 37
+        elif c == '#' :
+            val = 38
+        else :
+            return False
+        
+        if digitIndex & 1 :
+            val = val + val
+
+        check = check + (val // 10) + (val % 10)
+
+    return (check % 10) == 0
+
+
+@validator
+def cusip(value):
+    """
+    Return whether or not given value is a valid CUSIP.
+
+    If the value is a valid CUSIP this function returns ``True``, otherwise
+    :class:`~validators.utils.ValidationFailure`.
+
+    Examples::
+
+        >>> cusip('037833DP2')
+        True
+
+        >>> cusip('037833DP3')
+        ValidationFailure(func=cusip, ...)
+
+    .. versionadded:: 0.20
+
+    :param value: CUSIP string to validate
+    """
+    return len(value)==9 and cusipChecksum(value) 
+
+
+
+def isinChecksum( value ) :
+
+    check = 0 
+    val = None  # just to be extra safe - should not be needed but ...
+
+    for digitIndex in range(12) :
+        c = value[digitIndex]
+        if c >= '0' and c <= '9' and digitIndex>1 :
+            val = ord(c) - ord('0')
+        elif c >= 'A' and c <= 'Z' :
+            val = 10 + ord(c) - ord('A')
+        elif c >= 'a' and c <= 'z' :
+            val = 10 + ord(c) - ord('a')
+        else :
+            return False
+        
+        if digitIndex & 1 :
+            val = val + val
+
+    return  (check %10) == 0
+
+
+@validator
+def isin(value):
+    """
+    Return whether or not given value is a valid ISIN.
+
+    If the value is a valid ISIN this function returns ``True``, otherwise
+    :class:`~validators.utils.ValidationFailure`.
+
+    Examples::
+
+        >>> isin('037833DP2')
+        True
+
+        >>> isin('037833DP3')
+        ValidationFailure(func=isin, ...)
+
+    .. versionadded:: 0.20
+
+    :param value: ISIN string to validate
+    """
+    return len(value)==12 and isinChecksum(value) 
+
+
+
+
+@validator
+def sedol(value):
+    """
+    Return whether or not given value is a valid SEDOL.
+
+    If the value is a valid SEDOL this function returns ``True``, otherwise
+    :class:`~validators.utils.ValidationFailure`.
+
+    Examples::
+
+        >>> sedol('2936921')
+        True
+
+        >>> sedol('29A6922')
+        ValidationFailure(func=sedol, ...)
+
+    .. versionadded:: 0.20
+
+    :param value: SEDOL string to validate
+    """
+    if len(value)!=7 :
+        return False 
+
+    weights = [ 1, 3, 1, 7, 3, 9, 1 ]
+    check = 0 
+    for digitIndex in range(7) :
+        c = value[digitIndex]
+        if c in 'AEIOU' :
+            return False 
+
+        val = None
+        if c >= '0' and c <= '9' :
+            val = ord(c) - ord('0')
+        elif c >= 'A' and c <= 'Z' :
+            val = 10 + ord(c) - ord('A')
+        else :
+            return False
+        check += val * weights[digitIndex] 
+
+    return (check%10)==0