Apex domains cannot have CNAME records.
Question and response
Question
dig yodlee.com. NS
Answer
yodlee.com. 5 NS ns-1041.awsdns-02.org.
yodlee.com. 5 NS ns-600.awsdns-11.net.
yodlee.com. 5 NS ns-157.awsdns-19.com.
yodlee.com. 5 NS ns-1751.awsdns-26.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0