amgen
inc
et
al
connecticut
retirement
plans
trust
funds
argued
november
decided
february
recover
damages
private
action
securities
exchange
act
securities
exchange
commission
rule
plaintiff
must
prove
among
things
reliance
material
misrepresentation
omission
made
defendant
matrixx
initiatives
siracusano
requiring
proof
direct
reliance
place
unnecessarily
unrealistic
evidentiary
burden
plaintiff
traded
impersonal
market
basic
levinson
thus
endorsed
theory
permits
plaintiffs
invoke
rebuttable
presumption
reliance
public
material
misrepresentations
regarding
securities
traded
efficient
market
theory
facilitates
certification
class
actions
permitting
reliance
proved
classwide
basis
invoking
theory
respondent
connecticut
retirement
plans
trust
funds
connecticut
retirement
sought
certification
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action
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rule
civil
procedure
biotechnology
company
amgen
several
officers
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class
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circuit
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circuit
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connecticut
retirement
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prove
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alleged
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order
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rule
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law
fact
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circuit
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john
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securities
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including
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known
stock
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market
relevant
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took
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kagan
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washington
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trust
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certiorari
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circuit
february
justice
ginsburg
delivered
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case
involves
complaint
filed
connecticut
retirement
plans
trust
funds
connecticut
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amgen
several
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rule
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