The last day of a tumultuous month ended with the Dow and S&P 500 snapping their win streaks, though the Nasdaq did extend its five-day run. The tech and chip sectors were major supporters of this week's surge, while economic and jobs data also held weight.

All three indices are on track for impressive weekly gains, with the Nasdaq eyeing its best weekly performance since March. For the month, however, all three major indexes suffered monthly drops of 1.7% or more, with the Nasdaq logging its worst month since December.

OIL MARKS THIRD CONSECUTIVE MONTHLY WIN

Oil enjoyed its third consecutive month in the black, as supply concerns persisted and Saudi Arabia's million-barrel production cut is anticipated to be extended in October. The now front-month, October delivery added $2, or 2.5%, to settle at $83.63 per barrel for the day and 2.2% for the month.

Gold futures moved lower for the session and month, with worries surrounding the Fed's inflation gauge. December-dated gold dropped $7.10, or 0.4%, to settle at $1,965.90 an ounce for the day and down 2.2% for the month.

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