American Funds - Growth Fund of America - Class A Shares (AGTHX) +2 Fund Authority Score - The Skilled Investor's FUND AUTHO... American Funds - Growth Fund of America - Class A Shares (AGTHX) +2 Fund Authority Score - The Skilled Investor's FUND AUTHORITY SCORES for Mutual Funds and ETFs > US Large Capitalization Stock Mutual Funds & ETFs - Financial Articles, With 4.4 million shareholder accounts, the Growth Fund of America AGTHX is the largest actively managed stock mutual fund in the United States. The investment management objective of this mutual fund is to grow individual investor's capital. This article provides the Fund Authority Score for Class A Shares. in Public bookmarkswith agthxamericanclassfundsgrowthshares