Cumulative Return

Problem

Compute the simple cumulative return over a price path: prices[-1] / prices[0] - 1.

Return 0.0 when there are fewer than two prices or the first price is 0.0.

Hint

Only the first and last prices matter.

case 1

in: [[100,150]]

expected: 0.5

case 2

in: [[100,50]]

expected: -0.5

case 3

in: [[10]]

expected: 0

case 4

in: [[2,4,8]]

expected: 3

Starter codePython

def cumulative_return(prices):
    # Your code here
    pass

4 test cases · run your code against them in the editor