Stock to Watch

Danaher Corp. (ticker symbol: DHR), a Washington-based maker of tools and auto components, will replace Stone Container Corp. in the Standard & Poor’s 500 index at the close of trading Tuesday. Jefferson Smurfit Corp. is acquiring Stone Container, and the transaction is expected to close that day. Stocks of companies that join the S&P; 500 sometimes get a boost because mutual funds that seek to track the blue-chip index must buy shares. Danaher closed unchanged Wednesday at $40.38, while Stone Container fell 81 cents to close at $11.94.