The July 12 Night Watch,

Ariba Posts Earnings, After-Hours Investors Say 'Buy!', misstated the prices of the 10 most-active stocks as listed by

Instinet

. Those figures have since been corrected. (

corrected July 14

)

A July 14 story,

For E-Tailers, the Shipping News Isn't Good, misstated the formula for calculating profit margins. It is gross profit divided by revenue, not vice-versa. (

corrected July 14

)

A July 13 story,

Mapping Out Stocks for the Genome Gold Rush, mistakenly reported that

Alliance Capital's

new biotech fund closed with $500 million in assets. In fact, the fund, which hasn't closed, opened only recently and hasn't set an asset target. (

corrected July 14

)

A July 11 story,

Heidrick & Struggles Expects to Beat Estimates, incorrectly reported that

Heidrick & Struggles

(HSII:Nasdaq) expects second-quarter revenue to rise 40% to $113 million. In fact, the company expects second-quarter revenue to rise 40% from $113 million a year ago. The story also misidentified the company's chief executive; he is Patrick Pittard, not Richard Pittard. (

corrected July 12

)

A July 11 story,

Yahoo! Beats Estimates as Page Views Increase, misstated

Yahoo!'s

(YHOO:Nasdaq) year-ago second-quarter earnings. Accounting for a subsequent stock split, they were 5 cents a share, not 10 cents. (

corrected July 12

)

A July 7 story,

Yahoo! Wading Further Into the Free-Internet Waters, mistakenly referred to

Mentor Venture Partners

as Menlo Venture Partners. (

corrected July 12

)

The July 7 Fixed-Income Forum,

Where to Turn for Higher-Than-Treasury Yields, misstated the formula for calculating a municipal bond's taxable-equivalent yield. The article recommended multiplying the muni bond's yield by the quantity 1 plus the applicable marginal tax rate. The correct formula calls for dividing the muni bond's yield by the quantity 1 minus the marginal tax rate. (

corrected July 11

)