BOSTON ( TheStreet) -- Stocks fell from a 10-week high yesterday on renewed concern about slower economic growth. But the performance of riskier assets demonstrates confidence in a continuous economic expansion. Here are 10 speculative small-cap stocks that made huge gains in July. They are ordered by monthly return, from big to biggest.

10. Lithia Motors ( LAD) has advanced 34% in the past month. Lithia operates automotive franchises. It swung to a second-quarter loss of $1.7 million, or 6 cents a share, from a profit of $3.7 million, or 12 cents, a year earlier. But revenue grew 20% and adjusted profit increased 23%. Also, same-store sales, a crucial metric for retailers, jumped 26% for new vehicles and 15% for used vehicles. Lithia shares sell for a forward earnings multiple of 8.4, a 42% discount to the automotive industry average. JPMorgan ( JPM) and Stephens rate the stock "hold", but both value it at $10, implying 17% of upside.

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