Stocks that moved substantially or traded heavily Wednesday:
Twitter Inc., down $2.11 to $32.73
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Social media executives testified before Congress about their efforts to fight election meddling and charges of political bias.
Vera Bradley Inc., up $2.11 to $16.40
The clothing and accessories retailer raised its profit forecast after a strong second quarter.
RH, down $19.77 to $131.51
The home furnishings retailer reported weaker sales than analysts expected.
Halliburton Co., down $2.35 to $37.13
The oil and gas drilling company said a decrease in drilling activity and other issues will reduce its third-quarter profit.
Tabula Rasa Healthcare Inc., down $8.46 to $82.19
The health care software developer said it bought electronic health records company Mediture and administrative services company eClusive.
Caleres Inc., down $3.21 to $37.15
The footwear wholesaler and retailer's profit and sales fell short of Wall Street estimates.
Duluth Holdings Inc., up $4.02 to $34.21
The clothing and tools company had a stronger second quarter than analysts expected.
Adobe Systems Inc., down $10.54 to $256.14
Technology companies took sharp losses Wednesday after outsize gains over the last year.