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Ok, so the market went down. Run the numbers for the amount that your stocks "lost" comparing the statements from 4-5 months ago to the most recent. Then compare that to how much the Dow Jones or Standard and Poors has lost between those dates. If you find that your investments didn't lose as much as the market, they are pretty good investments.
You say you won't need the money for 25 years. Well, by that times, things will have changed. Stocks may split, value will be added. Dividends will be removed in the short term from some companies as they need to recover, and maybe added later when they recover. A good financial advisor may help you understand all this, as well as figure out how to get out of the bad stocks.
And I put "lost" in quotes because you haven't lost any money until you sell.
And meanwhile, as the first letter said, the CD interest rate will be changing.
Don't let the emotions of a down market push you out at a low, especially since you have no need for the money at this point.