"""They are both 20% falls. The mc in both stocks drops 20%, as...

"""They are both 20% falls. The mc in both stocks drops 20%, as does the value in your holding.""

If you have 500,000 shares at $3 and the stock drops 20% your porfolio drops $300,000

Those same 500,000 shares at 50c dropping 20% your portfolio drops $50,000....

The higher the price of any share, the DOLLAR VALUE of ANY move up or down increases. 20% at $1b isnt the same as 20% of $100 million, is it really that complex as its about 4th grade math at best.