A busy earnings week comes to a close Friday with a whimper, as only a handful of companies set to report quarterly results before the start of trading.

Schlumberger ( SLB), Ingersoll-Rand ( IR), Ericsson ( ERIC) and Black & Decker ( BDK) are on tap to post quarterly results before Friday's open.

Those earnings releases won't be as closely watched as, say, the 12 components of the Dow Jones Industrial Average that reported earlier in the week, so their impact on trading Friday may be minimal.

Of course, traders will continue to sift through the slate of earnings releases posted after Thursday's close, including Amazon.com ( AMZN), Microsoft ( MSFT) and American Express ( AXP).

Tech may be pressured by the Amazon and Microsoft earnings, as both companies missed their respective quarterly revenue targets. Both stocks were trading sharply lower in Thursday's after-hours session.

Away from earnings, the final economic report of the week comes at 9:55 a.m. EDT, when the University of Michigan will post the revised July reading of its consumer sentiment index. Economists anticipate no revision to the 64.6 reading initially reported.

The flow of economic releases has been light this week, but the upside surprises have helped power the major U.S. averages. For instance, better-than-expected reports on weekly initial jobless claims and June existing home sales pushed the Dow to its best close of 2009 and the Nasdaq extended its winning streak to 12 days.

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