Apple could be bad for your financial health Could the meteoric rise of Apple's stock price wreak havoc on your investment portfolio? The technology giant -- which recently saw its market value top $500 billion, moving it into territory where only a handful of companies have gone -- has seen its stock price rise 67 percent since hitting a 2011 low last June. At the same time, Apple has grown to become 4 percent of the Standard & Poor's 500-stock index, the largest weighting in the broad market gauge, and represents 13 percent of its year-to-date gain. Apple also represents a little over 20 percent of the overall technology sector, said Standard & Poor's Senior Index Analyst Howard Silverblatt, who appeared on CNBC Wednesday to discuss the issue. It now has a 19 percent weighting in the S&P's technology sector index. Apple's growing size and influence in these market gauges means any large swings in the company's stock price could have an outsized effect on your investments, he said. "One of the concerns is not all portfolio managers know what's in their portfolio," Silverblatt said. You need to know what's in your portfolio, how it's weighed and how it affects you. Does the meteoric rise of Apple's stock price worry you? Sound off on our Facebook page.