CERTIFICATIONS
EX-99.CERT
I, Jonathan S. Thomas, certify that:
1. | I have reviewed this report on Form N-CSR of American Century World Mutual Funds, Inc.; | |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or | |
omit to state a material fact necessary to make the statements made, in light of the circumstances | ||
under which such statements were made, not misleading with respect to the period covered by | ||
this report; | ||
3. | Based on my knowledge, the financial statements, and other financial information included in this | |
report, fairly present in all material respects the financial condition, results of operations, changes | ||
in net assets, and cash flows (if the financial statements are required to include a statement of | ||
cash flows) of the registrant as of, and for, the periods presented in this report; | ||
4. | The registrant's other certifying officer and I are responsible for establishing and maintaining | |
disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company | ||
Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the | ||
Investment Company Act of 1940) for the registrant and have: | ||
(a) | Designed such disclosure controls and procedures, or caused such disclosure controls and | |
procedures to be designed under our supervision, to ensure that material information | ||
relating to the registrant, including its consolidated subsidiaries, is made known to us by | ||
others within those entities, particularly during the period in which this report is being | ||
prepared; | ||
(b) | Designed such internal control over financial reporting, or caused such internal control | |
over financial reporting to be designed under our supervision, to provide reasonable | ||
assurance regarding the reliability of financial reporting and the preparation of financial | ||
statements for external purposes in accordance with generally accepted accounting | ||
principles; | ||
(c) | Evaluated the effectiveness of the registrant's disclosure controls and procedures and | |
presented in this report our conclusions about the effectiveness of the disclosure controls | ||
and procedures, as of a date within 90 days prior to the filing date of this report based on | ||
such evaluation; and | ||
(d) | Disclosed in this report any change in the registrant's internal control over financial | |
reporting that occurred during the second fiscal quarter of the period covered by this | ||
report that has materially affected, or is reasonably likely to materially affect, the | ||
registrant's internal control over financial reporting; and | ||
5. | The registrant's other certifying officer and I have disclosed to the registrant's auditors and the | |
audit committee of the registrant's board of directors (or persons performing the equivalent | ||
functions): | ||
(a) | All significant deficiencies and material weaknesses in the design or operation of internal | |
control over financial reporting which are reasonably likely to adversely affect the | ||
registrant's ability to record, process, summarize, and report financial information; and |
(b) | Any fraud, whether or not material, that involves management or other employees who | |
have a significant role in the registrant's internal control over financial reporting. |
Date: | January 29, 2010 |
/s/ Jonathan S. Thomas |
Jonathan S. Thomas |
President |
(principal executive officer) |
I, Robert J. Leach, certify that:
1. | I have reviewed this report on Form N-CSR of American Century World Mutual Funds, Inc.; | |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or | |
omit to state a material fact necessary to make the statements made, in light of the circumstances | ||
under which such statements were made, not misleading with respect to the period covered by | ||
this report; | ||
3. | Based on my knowledge, the financial statements, and other financial information included in this | |
report, fairly present in all material respects the financial condition, results of operations, changes | ||
in net assets, and cash flows (if the financial statements are required to include a statement of | ||
cash flows) of the registrant as of, and for, the periods presented in this report; | ||
4. | The registrant's other certifying officer and I are responsible for establishing and maintaining | |
disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company | ||
Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the | ||
Investment Company Act of 1940) for the registrant and have: | ||
(a) | Designed such disclosure controls and procedures, or caused such disclosure controls and | |
procedures to be designed under our supervision, to ensure that material information | ||
relating to the registrant, including its consolidated subsidiaries, is made known to us by | ||
others within those entities, particularly during the period in which this report is being | ||
prepared; | ||
(b) | Designed such internal control over financial reporting, or caused such internal control | |
over financial reporting to be designed under our supervision, to provide reasonable | ||
assurance regarding the reliability of financial reporting and the preparation of financial | ||
statements for external purposes in accordance with generally accepted accounting | ||
principles; | ||
(c) | Evaluated the effectiveness of the registrant's disclosure controls and procedures and | |
presented in this report our conclusions about the effectiveness of the disclosure controls | ||
and procedures, as of a date within 90 days prior to the filing date of this report based on | ||
such evaluation; and | ||
(d) | Disclosed in this report any change in the registrant's internal control over financial | |
reporting that occurred during the second fiscal quarter of the period covered by this | ||
report that has materially affected, or is reasonably likely to materially affect, the | ||
registrant's internal control over financial reporting; and | ||
5. | The registrant's other certifying officer and I have disclosed to the registrant's auditors and the | |
audit committee of the registrant's board of directors (or persons performing the equivalent | ||
functions): | ||
(a) | All significant deficiencies and material weaknesses in the design or operation of internal | |
control over financial reporting which are reasonably likely to adversely affect the | ||
registrant's ability to record, process, summarize, and report financial information; and |
(b) | Any fraud, whether or not material, that involves management or other employees who | |
have a significant role in the registrant's internal control over financial reporting. |
Date: | January 29, 2010 |
/s/ Robert J. Leach |
Robert J. Leach |
Vice President, Treasurer, and |
Chief Financial Officer |
(principal financial officer) |