Shares of Winnebago Industries Inc. and Thor Industries Inc. rose on Monday after an analyst upgraded shares of the recreational vehicle manufacturers, citing signs of improvement in the RV market.

Shares of Winnebago soared $1.40, or 10.3 percent, to $15 in midday trading. Shares of Thor jumped $2.33, or 7.4 percent, to $34 amid a rally in the broader market.