Mental stress test

Went to OCBC bank today
To open securities account
and also tried signing up for Peoms
Both for share financing
Peoms is surprisingly easy to sign up
but i had fear about put my biggest counter outside of CDP
but thought that it is a gd idea to put 1k shares in each for collateral
hopefully by the time they are set up, DBS is still at a good price

also did some mental stress test
and realization
that my DBS share financing account
should hold on about purchasing more shares
wanted to buy 500 OCBC today
as they have a lower non-interest income
which will not be affected so much by interest rate cut

so the calculation of the stress test
i injected 23k worth of shares into the dbs share financing
i bought 15k shares (capitamall, Cromwell, Aims)
but 5k (cromwell) is not marginable
the main thing is you have to imagine when shares fall 50%
less likely especially now that shares have already fallen 20%
but peace of mind is more important

so 23k + 10k = 33k (total asset value)
33k /  = 16.5k (another crisis hit, 50% drop)
16.5k / 15k = 110%, which is lower than 140%
and will trigger a margin call

I need 21k as the nominator, which is 4.5k extra
but it can be solved by adding cash funds
50% drop is unlikely at this moment
but it is always good to prepare mentally