Technology stocks are under pressure again, exposing a risk investors can easily overlook: owning several funds doesn’t automatically mean you have a diversified portfolio. On October 15, the Philadelphia Semiconductor Index fell as much as 4.4% before recovering some ground. A day later, the Nasdaq Composite dropped 2.1%, taking its weekly loss to 4.5%. The takeaway is not to abandon technology, but to build a portfolio that can withstand its swings.
What sparked the latest selloff
Investors are questioning whether massive artificial intelligence spending will generate sufficient returns. Saxo strategist Neil Wilson also cited stretched valuations, Chinese competition, inflation, and interest rates. Higher borrowing costs make expensive AI projects harder to finance.
The pressure reached Asian markets. South Korea’s Kospi plunged 7.57% on October 15 as major chipmakers tumbled. Yet the Dow gained 1.08% that day, with health care emerging as the S&P 500’s strongest-performing sector. The contrast shows why market concentration matters: sectors do not always move together.
How to build a portfolio that lasts
Begin by examining what you own. Information technology represented 38.38% of the S&P 500 on October 15, according to State Street. Holding a broad index fund alongside separate technology and AI funds may create more overlap than expected.
Diversify across industries and regions, and consider bonds in proportions suited to your goals and risk tolerance. Keep emergency savings accessible so unexpected expenses do not force sales during a downturn. Regular contributions and occasional rebalancing can also reduce the temptation to chase rallies or panic during losses.
History offers perspective. The Nasdaq lost about 78% between 2000 and 2002 and did not reclaim its previous closing peak until April 2015. AI may deliver long-term growth, but investors still need a plan that can survive disappointment.
