Wirecard's shares tumble 65% after the payments processor says it is unable to trace $2 billion worth of cash

· *German fintech group Wirecard's shares dropped more than 65% after it announced on Thursday that it could not trace about $2 billion in its cash balances.*
· *Wirecard said "spurious cash balances" may have been provided by a third-party to its auditor EY.*
· *The payments group once again delayed its fourth-quarter and...