India, Oct. 15 -- Building and upgrading railway lines is a business of long contracts, staged payments and money held back until work is signed off. That is normal for the sector, but it also means contractors can wait a long time to get paid. Performance bank guarantees and retention money lock up cash well after the work is done, and disputes with the main contractor can drag on for years. For a railway engineering company, getting that money back is almost as important as winning the next order.

The Nifty 50 traded at 23.038.85, up 1.83%, while the Sensex rose 2.03% to 74,254.91 on Wednesday. Meanwhile, Shares of E to E Transportation Infrastructurewere trading at Rs. 309.95, up 2.11% from previous close of Rs. 303.55. The stock ope...