Jim Cramer: This investment strategy is like 'magic,' especially for younger people—'you end up with just a huge amount of stock'

Jim Cramer: This investment strategy is like 'magic,' especially for younger people—'you end up with just a huge amount of stock'

Jim Cramer, host of CNBC's 'Mad Money,' says reinvesting cash payouts can have a bigger impact on returns than you might think — especially for young investors.