Tower Semiconductor Ltd., the Israeli chipmaker that more than doubled last year, is poised to extend its rally into 2015 as it benefits from companies seeking to outsource chip production, analysts who cover the stock say. Tower's 128 percent advance was the best performance in the Bloomberg Israel-US Equity index, trouncing the average 8.5 percent gain and ahead of the 62 percent return of the next-best performer, Mobileye NV.