Key stock updates: Welspun Corp's historic order, Leapfrog's PLC contract, and significant moves by Rane, Niva Bupa, and others.

Key stock updates: Welspun Corp's historic order, Leapfrog's PLC contract, and significant moves by Rane, Niva Bupa, and others.

Welspun Corp shares rallied as much as 9% after the company secured its largest-ever order worth $1.8 billion, or around Rs 17,200 crore, for pipe supplies from its US…