TheStreet.com stock rose 13.55 percent, or 2.19 points, to 17.81. The stock has traded as high as 71.25 and as low as 14 since it went public in May.
The agreement, which builds on an existing alliance the two media companies began last year, will give high visibility to New York-based TheStreet.com in AOL's and CompuServe's personal finance areas. TheStreet.com also will provide headlines for AOL.com and Netscape Netcenter.
Under the terms of the agreement, TheStreet.co.uk, a British edition of the news site that will be launched in early 2000, will syndicate its content to AOL U.K., a division of AOL Europe.
AOL, based in Dulles, Va., said it has more than 21 million members worldwide, including those who subscribe to CompuServe.