English to French Bus/Financial Finance (general)

Bonjour,

Je ne sais pas comment traduire "2-day window".
L'expression apparaît dans le paragraphe suivant :

"It seems that both partners to a lending relationship derivepositive value from this engagement. Firms derive accreditation and the economic value emating from it, as highlighted in the work of Jame, who finds that bank loan announcements are associated with positive and statistically significant stock price reactions (shown to equal about 200 basis points in a 2-day window), while announcements of privately placed and public issues of debt experience zero or negative stock price reactions."

Je pense qu'il s'agit de deux jours consécutifs de bourse, mais je n'en suis pas du tout certaine.
Merci d'avance.