<prompt> Human: What resources should I read to learn more about this? I have a feeling the answer is dont try it, but I would like something that shows me how its a bad idea. If the stock market started to correct over the next year, why wouldnt I just move my stocks to bonds after the market drops 5 and leave them in bonds for a year or two?  <response>: ...because the market may not keep dropping after stocks drop 5?Look at what happened in January 2016, for example. The market declined 8 in three weeks at the start of January.If you sold out then, youd have missed out on almost 40 gains since then. Ouch.Here is a post I made at the time even though it says one year ago, these were purchased 12516, buying more on the dip: 