US STOCKS-Wall St set to open lower as oil prices drop
* Fed Chair Yellen to speak at Jackson Hole on Friday
* Dollar rises for second day on interest rate hike bets
* Medivation jumps on $14 bln Pfizer deal
* Futures down: Dow 34 pts, S&P 3.25 pts, Nasdaq 6.25 pts (Adds details, comments, updates prices)
By Yashaswini Swamynathan
Aug 22 (Reuters) - Wall Street looked set for a lower open on Monday as oil prices dropped the most in four weeks and dollar strengthened on bets of an interest rate hike in the coming months.
With the earnings season coming to an end, investor focus will shift to Federal Reserve Chair Janet Yellen's speech on Friday at the annual central bankers' meeting in Jackson Hole, Wyoming.
"The markets will start to get a little bit nervous about what's going to be said, what kind of indications will be given about a September hike," said Robert Pavlik, chief market strategist at Boston Private Wealth in New York.
The case for an imminent rate hike was strengthened by Fed Vice Chairman Stanley Fischer's comments that the U.S. economy was close to hitting job and inflation targets. Continuación...