By Dan Weil The Russell 1000 Growth index has soared 18% since June 16, compared to a 9% rise for the Russell 1000 Value index. Growth stocks are on quite a run over the past seven weeks amid anticipation the Federal Reserve might curb its interest-rate increases. The Russell 1000 Growth index has soared 18% since June 16, compared with a rise of half that for the Russell 1000 Value index. Higher interest rates hurt growth stocks by making their expected earnings stream less valuable than Treasury securities with rising yields. Hopes for smaller Fed rate increases were dashed by the Aug. 5 new…