S&P 500 clears major resistance, sans volume By: MarketWatch August 03, 2010 at 13:36 PM EDT While the S&P has cleared its 200-day moving average, this week's slight breakout has come on light volume, raising questions about the rally's durability. Read More >> Related Stocks: Canadian National Railway Company Cirrus Logic Inc Honeywell International Lincoln National Oceaneering International SPDR S&P 500 ETF Trust