In what could bring a surprising and rare monthly decline, March auto sales now hang on the final days to see if results are positive or if March will become the sixth month since 2009 with a U.S. auto market year-over-year sales slump.

According to INAUTONEWS, if the tally indeed proves negative when sales figures are compiled, March could signal the beginning of a flatter position for the market, coming out of one of its longest-running periods of monthly increases in history.

So far, volumes are very close to figures seen last year in the same period, so the end result is likely dependant on how many deliveries will be recorded by dealers until next Tuesday.

Even if the tally turns negative this month, analysts are confident that earlier predictions that put total auto sales in 2015 in the 17 million units area would be met.

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