A customer who sold a bond at a loss must wait how long before he can buy back a substantially identical bond and not have the sale classified as a wash sale?
30 days.
The answer is "<span>Heaps are complete binary trees".</span>
In software engineering, a heap is a particular tree-based information structure that fulfills the heap property. The heap is one maximally effective execution of a dynamic information sort called a priority queues, and in reality priority queues are regularly alluded to as "heaps", regardless of how they might be implemented.