Propensity, or character, is admissible if character is an essential element of a claim, charge, or defense.

United States v. Seymour, 468 F.3d 378, 386-387 (6th Cir. 2006) (holding that evidence of victim's specific instances of conduct was inadmissible where such character was not an essential element of the charge against the defendant).When an exception makes the victim's character admissible, the testimony of a witness on direct examination about the victim's character must take the form of opinion or reputation and it cannot take the form of specific instances of victim's conduct.

Fed. R. Evid. 803(17) ("Market quotations, tabulations, lists, directories, or other published compilations, generally used and relied upon by the public or by persons in particular occupations.").There is a hearsay exception for market quotations, directories, or similar published compilations that are generally used and relied upon either by the public or by members of particular occupations.

Crane v. Kentucky, 476 U.S. 683, 690 (1986).The right to due process guaranteed by the Fifth and Fourteenth Amendments prohibits the exclusion of probative exculpatory evidence in criminal trials when exclusion of such evidence is unreasonable, arbitrary, or disproportionate.