Thanks bar1080 for the link. Certainly worth reading.
Anyway, on another subject, how the market is moving in micro-steps up and down. A while back I posted about my positions going up and down only a small percentage. Well, because there was a slight screw-up in how a bond was closed I went back and collected the data for the whole account over the last couple of weeks. Here are the results starting on 8/21 through yesterday:
+0.41%, -0.12%, -0.08%, -0.04%, +0.05%, +0.03%, +0.17%, -0.11%, -0.18%, +0.21%, +0.28%, -0.02%, a total up 0.6%, not at all bad but if one uses a SELL safe of 0% and a minimum trade of 10% of shares this would mean waiting about 200 days for the next trade on the whole package.
Thank goodness one is dealing with individual positions with somewhat more volatility.