I'm a very patient investor. Most of my holdings are for multiple years. I can't recall any investment that I've made where I've sold shares held for less than a year. I look at shuffling my investments when the opportunity arises. I regularly ask myself, if all my holdings were converted to cash, where would I put it? If it doesn't match my current holdings, then I'm not being honest with my investment strategy.
As for manipulation, it's not surprising to me and I'm not upset by it. If anything, it's given me an opportunity to purchase shares at what I believe to be a very under-valued price.