Taiwan Semiconductor Manufacturing Co. Ltd. became the world's ninth-most valuable company after its market capitalization surged 101% year over year to $1.427 trillion as of March 31. The ranking, based on a report by PwC Taiwan, highlights the company's rapid ascent from 12th place a year earlier. The surge was driven by robust demand for artificial intelligence infrastructure, which has solidified the chipmaker's position among global leaders.

The company was the fastest-growing entity within the global top 10 and the only Taiwanese firm to make the list. Its rise propelled Taiwan from seventh to fourth among economies represented in the rankings, trailing only the United States, China, and Saudi Arabia. PwC Taiwan chief markets officer Lin Yi-fan noted that strong demand for AI devices and semiconductors doubled Taiwan Semiconductor's market value, underscoring Taiwan's critical role in the global technology supply chain.

Despite the growth, Lin warned that Taiwan's heavy reliance on a single industry creates risk. He emphasized that while semiconductor and AI supply chains remain key growth drivers, long-term market-value growth could face pressure from swings in the semiconductor cycle. This underscores the importance of industrial diversification for sustained economic stability.

The top 10 companies by market capitalization included NVIDIA Corporation, Apple Inc., Alphabet Inc., Microsoft Corporation, Amazon.com, Inc., Saudi Arabian Oil Company (Saudi Aramco), Broadcom Inc., Meta Platforms, Inc., Taiwan Semiconductor, and Tesla, Inc. The list reflects the dominance of technology and energy giants in the global market landscape.

From a technical perspective, Taiwan Semiconductor's stock remains in a clear longer-term uptrend. It is trading 3.6% above its 20-day SMA ($415.49), 10.1% above its 50-day SMA ($391.04), and 31.5% above its 200-day SMA ($327.29). The 20-day SMA is above the 50-day SMA, and the stock continues to benefit from a golden cross that formed in June 2025. However, momentum indicators suggest upside pressure is cooling, with the MACD below its signal line and a negative histogram.

Key support for the stock is identified at $385.00, a level where buyers previously stepped in and which aligns with the broader trend area around the 50-day moving average. On the upside, the 52-week high of $450.16, set in June, remains the primary reference point for further gains. Taiwan Semiconductor shares were up 0.75% at $430.00 during premarket trading on Tuesday.