Stocks making the biggest moves midday: Scholastic, AutoNation, Herc, American Express and more

Check retired the companies making headlines successful midday trading.

Scholastic — The steadfast jumped 14.2% aft announcing it would summation its stock repurchase magnitude by $100 million. Traders besides appeared to cheer the company's quarterly results. Scholastic posted $2.26 successful net per stock connected gross of $428.3 million.

American Express — Shares slipped astir 4% aft the institution reported second-quarter gross of $15.05 billion, falling abbreviated of the $15.48 cardinal expected from analysts polled by Refinitiv. However, American Express' net per stock bushed expectations.

Herc — Herc dropped much than 5% aft Bank of America double-downgraded shares to underperform from buy. Analyst Sherif El-Sabbahy said the effect from the ongoing writers and actors onslaught successful Hollywood volition wounded the instrumentality rental stock.

AutoNation — AutoNation tumbled 7% during midday trading. The car trader reported second-quarter results that exceeded expectations connected the apical and bottommost lines. AutoNation posted adjusted net of $6.29 per stock connected gross of $6.89 billion. Analysts expected per-share net of $5.91 connected gross of $6.78 billion.

Knight-Swift Transportation — Knight-Swift Transportation gained much than 2% successful midday trading. The determination comes adjacent aft Knight-Swift reported second-quarter net and gross that were weaker than expected. The institution besides issued lackluster guidance.

PPG Industries — Shares roseate 1.7% aft PPG Industries posted beardown second-quarter results. The supplier of paints, coatings and different materials posted adjusted net of $2.25 connected gross of $4.87 billion. Analysts polled by StreetAccount expected net of $2.14 per stock and gross of $4.84 billion. The institution besides raised its current-quarter and full-year net guidance.

Capital One Financial — Capital One Financial roseate astir 1% aft the fiscal institution topped net expectations for the 2nd quarter. Capital One reported adjusted net of $3.52 per share, which topped a Refinitiv estimation of $3.23 per share. However, its gross missed expectations. Total deposits besides decreased 2% astatine the extremity of the 2nd quarter.

Intuitive Surgical — The health-care banal declined 1.6% aft Intuitive Surgical posted weaker-than-expected systems gross for the 2nd quarter. The institution posted systems gross of $392.7 million, little than the $415.9 million, according to a statement estimation from StreetAccount.

Sunnova Energy International — Shares fell much than 3% pursuing a downgrade from BMO Capital Markets. The steadfast said though it is "constructive" connected maturation successful the agelong term, the existent macro situation for the residential star manufacture successful the U.S. remains challenging.

CSX — CSX slid much than 4% aft the proscription institution reported disappointing second-quarter revenue. The institution reported gross of $3.7 billion, which was weaker than $3.74 cardinal expected by analysts polled by Refinitiv. Earnings per stock came successful enactment with statement astatine 49 cents.

— CNBC's Michelle Fox, Alex Harring and Hakyung Kim contributed reporting.