Wall St. ends the week at the highest since March

Wall Street closed the week on its highest levels since March as analysts expect the stronger economy would withstand a likely rate hike soon. 

Federal Reserve Chair Janet Yellen stated in an earlier speech that current conditions are "appropriate" for a rate hike in the next months, while the bank will take high caution in dealing with monetary policy to guarantee markets will accept the tighter conditions.  

Yellen's statement propped U.S. shares before the close and drove the dollar to its highest in eight weeks, edging commodity pries lower in response. 

The dollar index, which tracks the greenback against a basket of six major rivals, last traded at 95.75, compared to the opening of 95.16, with an eight-week high at 95.77, and a session-low at 95.08, after the index plumbed a one-week low yesterday at 94.94 before reversing higher today. 

Standard and Poor's 500 rose 0.43%, or 8.96 points to 2,099.06, while Dow Jones gained 0.25%, or 44.93 points to close at 17,873.22. 

Tech-heavy NASDAQ jumped 0.65%, or 31.74 points to 4,933.50.