A recent decision by the Securities and Exchange Commission to begin allowing fund companies to create ETF shares classes of traditional mutual funds is expected to lead to a flood of new ETFs on the market, but State Street's fund management arm, State Street Investment Management, has other ideas. The ETF giant, which manages roughly to $1.7 trillion in its SPDRs ETF family — including the oldest and most-widely traded S&P 500 exchange-traded fund, SPY, and the biggest gold ETF, GLD — sees the SEC greenli ...