Europe eyes new Greek aid, rescue fund overhaul.
Markets breathe big sigh of relief on Greek hopes.
Express Scripts will buy rival Medco for $29.1B.
Hope for a European debt deal lifts markets.
More people sought unemployment benefits last week.
Progress scarce as debt limit impasse continues.
Leading indicators rise, signal slow growth.
Philadelphia Fed manufacturing index rebounds.
United Continental 2Q profit drops.
AT&T stays strong against threat of Verizon iPhone.