Key Highlights

● Wendy's soared on a reported take-private proposal.

● LCI Industries rose on a competing cash offer.

● Several earnings-driven moves were among the day's sharpest.

● The Russell 2000 outpaced the S&P 500's gain.

The smallest companies in the S&P family produced some of the most eye-catching moves, as takeover offers, earnings beats and guidance cuts sent several small-cap stocks soaring or sinking, even as the major indexes posted modest gains. The Russell 2000, a small-cap benchmark, outpaced the S&P 500's own advance.

Deal news drove the biggest gains, with Wendy's soaring after a reported non-binding proposal from Trian to take the restaurant chain private, and LCI Industries rising after a private-equity firm made a competing cash offer against an existing merger agreement.

Earnings Drove Sharp Swings

Forward Air jumped after announcing a two-year agreement with a major customer, while Simply Good Foods rocketed higher after its fiscal fourth-quarter earnings and sales topped estimates, even though it guided to lower sales ahead.

Ultra Clean Holdings, a supplier to chip-equipment makers, climbed after record quarterly revenue, and ProPetro rose on a revenue beat tied to data-center power work.

Guidance Cuts Punished Others

Diebold Nixdorf tumbled despite beating third-quarter estimates, after cutting its full-year guidance citing a shift in revenue mix and raw-material costs. PROG Holdings slid after trimming its annual outlook, describing a more cautious view of the consumer.

Smaller companies tend to have less diversified businesses and thinner trading volume, so a single earnings report or deal can move their shares far more than it would for a large company.