Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Foolish to place orders before the market opens?
More on a technical note, but the spread on an ETF tends to be worst at market open and near market close. (assuming the ETF constituents are traded on a synchronous basis.) If possible, it's often best to let market makers get up and running before allowing your order to flow into market.