We're selling some shares of a parabolic mover, more than tripling our money

We're selling 50 shares of Corning at roughly $267. Following Tuesday's trade, Jim Cramer's Charitable Trust will own 450 shares of GLW, decreasing its weighting in the portfolio to 3% from about 3.33%. We're selling more Corning into strength as shares of the glassmaker extend their recent parabolic run. Corning's optical fiber is a hot commodity in data centers, and it makes smartphone glass. The stock has now jumped another 20% since we sold 50 shares last week into what was then a 16% rally over a couple of days. Corning shares are now up more than 200% year to date, making it the 8 th best stock in the S & P 500. It hit another all-time intraday high Tuesday. GLW YTD mountain Corning YTD As the gains continue to build, the position has grown into a larger portion of the portfolio, prompting us to trim it back. Also, we are struggling to find a specific announcement that justifies this move over such a short period of time. We don't want to give these big gains back, so we're locking in profits. From this sale, we will realize a huge gain of about 210% (more than a triple) on stock purchased in October. (Jim Cramer's Charitable Trust is long GLW. See here for a full list of the stocks.) As a subscriber to the CNBC Investing Club with Jim Cramer, you will receive a trade alert before Jim makes a trade. Jim waits 45 minutes after sending a trade alert before buying or selling a stock in his charitable trust's portfolio. …