By Chuck Mikolajczak

NEW YORK, Nov 5 (Reuters) - A slew of solid corporate earnings and monthly same-store sales results bolstered small- and midcap stocks on Thursday, led by consumer discretionary shares.

Midcap outdoor media advertiser Lamar Advertising Co (LAMR.O: Quote, Profile, Research) surged 17.4 percent to $29.43 after reporting a narrow-than-expected quarterly loss and forecast fourth-quarter revenue above expectations. [ID:nBNG103599]

The S&P MidCap Consumer Discretionary index gained 1.3 percent.

The S&P SmallCap Consumer Discretionary index advanced 2.2 percent, aided by a 16.4 percent rise in K-Swiss Inc (KSWS.O: Quote, Profile, Research) after narrower-than-expected earnings and strong third-quarter sales results from Children's Place Retail Stores Inc, which added 7.9 percent to $34.97. [ID:nBNG291653] [ID:nBNG369421]

"The smaller companies are coming through with earnings," said Kevin Kruszenski, head of listed trading at KeyBanc Capital Markets in Cleveland.

"The same store sales data was pretty good as well. That's certainly helping move those around."

Buildings products maker Gibraltar Industries Inc (ROCK.O: Quote, Profile, Research) jumped 15.8 percent to $13.19 after posting better-than-expected quarterly results on cost cutting and a continued reduction in debt, helping to push the S&P SmallCap Industrials index up 3 percent. For details, see [ID:nBNG527512]

There were also disappointments among consumer discretionary stocks as several retailers failed to meet Wall Street expectations. [ID:nN04548927]