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How to Buy, Sell and Choose ETFs
3:56 PM PST, February 18, 2009
We love hearing from our readers when they have questions about exchange traded funds (ETFs) or the trend-following strategy. This reader had specific questions about when we buy ETFs, when we sell them and how we choose them.
1. Is the 200-day moving average the SMA or EMA?
We use the 200-day EMA. What’s the difference? The simple moving average (SMA) is calculated by tracking the price of a security over a particular time period. The exponential moving average (EMA) involves a trickier mathematical formula which puts greater weight on the most recent price movement rather than an equal weight over past 200 days. The moving average you choose is a matter of personal preference, but the EMA is consistently closer to the actual"
Wednesday, February 25, 2009
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