Toymaker Mattel is tumbling this morning after the company pulled its planned bond sale after an anonymous whistleblower letter emerged. The bond sales was originally expected to close Thursday. Mattel saying it plans to refinance bonds that are due in October 2020 before maturity. The toymaker will be looking into the matters outlined in the letter. This all comes after we saw stronger-than-expected second quarter for the company. Yahoo Finance’s Heidi Chung, Akiko Fujita and Scott Gamm discuss.