In trading on Tuesday, shares of the PowerShares S&P 500 BuyWrite Portfolio ETF (PBP) crossed below their 200 day moving average of $20.95, changing hands as low as $20.94 per share. PowerShares S&P 500 BuyWrite Portfolio shares are currently trading down about 0.2% on the day. The chart below shows the one year performance of PBP shares, versus its 200 day moving average:
