Random Walk: SyntaxError: 'return' outside function

I am trying to do a Random Walk, so to do a Monte Carlo Simulation afterwards. Unfortunately, I got stuck on the end of the walk. I have checked already to find a solution, but, despite finding many with my same problem, nothing seems to work, but I am really struggling to understand why. My code is the following:

import random

def Financial_wealth(n):
"""Return coordinates after 'n=t' time in financial markets"""
x, y = 0, 0

for i in range(T+start_age):
   (dx, dy) = random.choice([(1, random.normalvariate(r, sigma)), (1, r)])
   x += dx
   y += dy
   return(x, y)

for i in range(T+start_age):
   walk = random_walk(1)
   print (walk, "Period-to-period return = ",
           ((walk[1]-walk[0])/walk[0]))

After running this, I get:

File "<ipython-input-13-a2dc598eb6f6>", line 15
   return(x, y)
   ^
SyntaxError: 'return' outside function

"T+start_age" is 65. I kept it like this in case i'll have to make changes in the future, but it does't seem to me (I really could be wrong) that the issue lies there.