Section 906 Certifications - --------------------------- I, Charles E. Porter, a principal financial officer of the Funds listed on Attachment A, certify that, to my knowledge: 1. The form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A. /s/Charles E. Porter Date: October 28, 2003 - ---------------------- ------------------------ Charles E. Porter, Principal Financial Officer Section 906 Certifications - --------------------------- I, Karnig H. Durgarian, the principal executive officer of the Funds listed on Attachment A, certify that, to my knowledge: 1. The form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A. /s/Karnig H. Durgarian Date: October 28, 2003 - ---------------------- ------------------------ Karnig H. Durgarian, Principal Executive Officer Section 906 Certifications - --------------------------- I, Steven D. Krichmar, a principal financial officer of the Funds listed on Attachment A, certify that, to my knowledge: 1. The form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended August 31, 2003 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A. /s/Steven D. Krichmar Date: October 28, 2003 - ---------------------- ------------------------ Steven D. Krichmar, Principal Financial Officer Attachment A - -------------- 014 Putnam High Yield Trust 018 Putnam Global Natural Resources Fund 021 Putnam Health Sciences Trust 061 Putnam High Income Bond Fund 224 Putnam High Income Opportunities Trust 274 Putnam New Value Fund 2AZ Putnam International Capital Opportunities Fund 2MF Putnam Small Cap Value Fund 2UO Putnam International Blend