Intel (INTC) stock fell to a new 52-week low Tuesday, a day after the surprise retirement announcement of CEO Paul Otellini. Meanwhile, shares of chip designer ARM Holdings (ARMH), the company giving Intel fits, is trading near a 12-year high. In afternoon trading Tuesday, Intel shares were down more than 4%, near 19.40. Year to date, Intel is down 20%. Meanwhile, ARM's U.S. shares are up 24% year to date. Its stock was down 3.6% Tuesday, near