He wants to share out his money between his two young daughters because he fears that his heirs will be unjust to them

It is
permissible for the father to share out whatever he wants of his wealth
between his daughters and transfer it to their ownership. This comes under
the heading of giving gifts. But he does not have the right to share out all
of his wealth with the aim of depriving the rest of his heirs. This has been
discussed in the answer to question no.
132928 

In
Fataawa al-Lajnah ad-Daa’imah (16/484) it says: Praise be to Allah, my
Lord has blessed me with four daughters, aged 10, 8, 5 and 3 years, and a
wife. I have a sister who is married, and she has children. I own a building
comprised of four apartments. I have written a sale contract between me and
my wife for one third of the value of the building, and I wrote another sale
contract between me and my wife so that she can buy the second third for my
daughters. So the first third is for my wife and the second third is for my
daughters, and I have left the last third. Of course I tell you frankly that
I have not received any money; the purpose behind that is so that no one
will dispute with them concerning their inheritance, because they are girls
(i.e., weak offspring). What is the ruling on that? Please advise me, may
Allah reward you with good. 

Answer: it
is not permissible for a man to draw up a contract to transfer his wealth in
order to deprive some of the heirs. Allah, may He be glorified and exalted,
is watching each individual and sees his intention and aims. We warn you
against doing something for which you may be punished. And Allah is the
source of strength. May Allah send blessings and peace upon our Prophet
Muhammad and his family and companions. 

Bakr Abu
Zayd, ‘Abd al-‘Azeez Aal ash-Shaykh, Saalih al-Fawzaan, ‘Abdullah ibn
Ghadyaan, ‘Abd al-‘Azeez ibn ‘Abdullah ibn Baaz.

End quote. 

Secondly: 

The
investment certificates issued by banks of all three types, A, B and C, are
all haraam. 

This has
been discussed previously in the answer to question no.
126073 

If the
certificates that you have are of this type, you have to get rid of them and
get your money back, and look for another place where you can invest it in a
halaal manner. 

We ask Allah
to help you and provide for you by His grace. 

And Allah knows best.