The new analysis has confirmed earlier evidence that patients with high Oncotype DX risk scores appear to benefit significantly from added chemotherapy.
The index, which underperformed the Dow Jones and the Nasdaq, gave back the 11 percent gain it made in June.
Financial analysts seemed convinced of the long-term advantages of the deal but noted that investors may remain skeptical in the near term.
The company's total revenues were $114.1 million compared with $95.6 million in the same quarter last year, beating analysts' expectations.
Exact said it will pay $72 per share for Genomic Health for a total transaction price of $2.8 billion in cash and stock.
Authors concluded that all three assays — Oncotype DX, EndoPredict, and Prosigna — met Canadian thresholds for cost-effectiveness and urged caution in considering the findings.
Under the determination, which will become final following publication in Germany's Federal Gazette, Oncotype DX becomes the only multigene test nationally reimbursed in Germany for its target population early-stage breast cancer patients.
The investment bank cited management confidence in US and European test growth as meriting the upgrade, which was necessary to maintain a current $72 price target on the firm's stock.
Meeting presentations supported tweaking the clinical interpretation of Genomic Health's Oncotype DX and bolstered Biotheranostics' Breast Cancer Index.
Individual stocks in the GenomeWeb Index were mostly down in May, with 21 of the 30 stocks posting losses and nine stocks recording gains.
Russian CRISPR researcher moves along with plans to ultimately alter the genes of embryos of deaf couples, though awaits regulatory approval, Nature News reports.
University of California, San Francisco, researchers have uncovered a gene mutations that appears to make a father-son duo more efficient sleepers.
NPR reports a large health insurer has begun to cover some pharmacogenetic tests for psychiatric drugs.
In PLOS this week: genome-wide association study of non-syndromic orofacial cleft subtypes, epigenetic and transcriptomic analysis of pancreatic ductal adenocarcinoma, and more.