GLOBAL MARKETS-Equities rise on Fed signals; oil resumes declines

* Wall Street on track for second day of strong gains* Swiss central bank to charge for deposits, franc hit* Oil slides again after short-covering gainsBy Michael ConnorNEW YORK, Dec 18 (Reuters) - Global equities markets rallied on Thursday, with Wall Street up more than 1 percent for a second straight day with investor sentiment buoyed by comments from the U.S. Federal Reserve&aposs last policy