Software exporter Wipro said on Monday the payable date for its American Depository Receipts (ADR) bonus issue is yet to be determined. The clarification from India's third-largest software services company came after its US-listed shares slumped nearly 49 percent to $5.35 in premarket trading. The trading of the shares, which was halted for a while, are currently down 1.5 percent at $10.29. "The company felt that it was important to clarify to ...