This article was extracted from Warren Buffett's letters to Berkshire Hathaway's shareholders in 1994. It's available at : http://www.berkshirehathaway.com/letters/1994.html
We try to price, rather than time, purchases. In our view, it is folly to forego buying shares in an outstanding business whose long-term future is predictable, because of short-term worries about an economy or a stock market that we know to be unpredictable. Why scrap an informed decision because of an uninformed guess?
We purchased National Indemnity in 1967, See's in 1972, Buffalo News in 1977, Nebraska Furniture Mart in 1983, and Scott Fetzer in 1986 because those are the years they became available and because we thought the prices they carried were acceptable. In each case, we pondered what the business was likely to do, not what the Dow, the Fed, or the economy might do. If we see this approach as making sense in the purchase of businesses in their entirety, why should we change tack when we are purchasing small pieces of wonderful businesses in the stock market?
Before looking at new investments, we consider adding to old ones. If a business is attractive enough to buy once, it may well pay to repeat the process. We would love to increase our economic interest in See's or Scott Fetzer, but we haven't found a way to add to a 100% holding. In the stock market, however, an investor frequently gets the chance to increase his economic interest in businesses he knows and likes.