Apple accounts for a record high in the S & P 500, expanding to 7.6%

CTOnews.com, July 4 (Xinhua)-- Apple shares have soared 49% this year, becoming the first company in the world to close with a market capitalization of more than $3 trillion, according to Reuters.

The weight of apple shares in the s & p 500 has ballooned to 7.6%, a new weight for the benchmark index, according to the s & p Dow.

Higher weighting means that Apple's share price has a huge impact on index performance. Instead, many fund managers face a thorny problem: they don't have enough stocks, CTOnews.com reported, citing Reuters.

Many investors may be reluctant to place heavy bets on individual stocks out of a desire for portfolio flexibility, so most investors allocate less than 7.6% to apple.

If Apple's share price continues to rise, it will be most vulnerable to active fund managers who strive to outperform indexes such as the S & P or Russell 1000.