In modern war, being a General is not enough, you need to be the Commander-In-Chief of three forces - Air, Sea, and Land.
Is your Portfolio also consists of Air, Sea, and Land - diversified forces of power so that you can endure attack from the Market from any corner and still survive without badly damage.
Not all stocks will be hit with the same degree of destruction, and surprisingly, some of them may even rise in a down market - this is known as Sector Rotation in play.
When you have Holding Power, it can only help you to prevent panic selling and exit market with big losses. But, Holding Power may not necessary enable you to recover back to the previous level of fall.
Just like your three forces - Air, Sea, and Land are all engaged at the battlefield; they are fully exhausted, and really unable to push forward anymore. You as the Commander-In-Chief will then need to activate your Reservists - your fresh reserve force to help you to push forward and to recover lost battleground.
So to really recover from your losses besides your Holding Power, you will still need fresh Firing Power - your Reservists.
So have you been keeping your Reservists ever ready when the needs arise?