Adani Ports & Special Economic Zone's stock surged by over 4% to reach a peak of Rs 857.70 on the NSE last Monday. Market enthusiasm is driven by expectations that the company will emerge as a major beneficiary of the port infrastructure developments within the forthcoming economic corridor, connecting the Middle East, South Asia, and eventually Europe.This economic corridor entails the establishment of crucial rail and port connections bridging the Middle East, South Asia, and Europe—a development recently praised by US President Joe Biden as a significant accomplishment during the G20 summit. The announcement was a pivotal outcome of a three-day diplomatic gathering involving leaders from the United States, India, and Saudi Arabia.Shares of Adani Ports, India's premier port operator, experienced gains, much like railway stocks, which saw substantial surges of up to 15% during early trading. IRCON, for instance, witnessed a notable 15% increase, while IRFC shares soared by 10%, reaching the upper circuit. RVNL also registered a robust uptick of 9.4%, and Titagarh Wagons traded 5% higher.Nevertheless, detailed information regarding project financing and timelines remains elusive. This ambitious initiative encompasses the laying of railway lines in the Middle East, subsequently connecting them to India via port infrastructure, as reported by Reuters. The Biden administration is positioning itself as an alternative partner and investor for developing countries, aiming to counter China's Belt and Road initiative in global infrastructure development within the G20 framework.Simultaneously, the promoter group led by billionaire Gautam Adani has increased its stake in Adani Ports from 63.06% to 65.23%, according to company filings. The group has also augmented its stake in the flagship entity, Adani Enterprises, from 69.87% to 71.93%. This strategic move is part of Adani's ongoing efforts to recover from previous setbacks due to damaging reports.Notably, this marks the second time in less than a month that the promoters have increased their stakes in the flagship firm, which incubates new businesses.Resurgent Trade and Investment acquired nearly 1% of Adani Ports and Special Economic Zone through open market transactions, while Emerging Market Investment DMCC purchased an additional 1.2%. Both of these entities are part of the promoter group.In the case of Adani Enterprises, the shares were acquired by Kempas Trade and Investment and Infinite Trade and Investment. Filings reveal that these stakes were procured through open market transactions conducted between August 14 and September 8.These recent developments closely follow the investment made by the U.S.-based boutique investment firm GQG Partners in Adani group companies, underscoring the growing interest in the Adani conglomerate.