Relate each of the following events with one appropriate principle of finance and supported by your justification.

a$)$ Kouk $,$ a well$-$known investor in Malaysia, who is known for holding onto his S&P $500$ stocks forever; had sold off $2\mathrm{.}7$ million shares, valued at US$$310$ million as of Dec $31,2023.$

b$)$ Average EBIT margins of main airline carriers dropped from the historic peak at $47\%$ achieved in the third quarter of $2023$ to $11\mathrm{.}8\%$ in the fourth quarter of $2023.$

c$)$ In January $2023,$ the director of KWSP urged all Malaysians that it's never too early to start saving for retirement.

d$)$ On $23$ April $2023,$ The Washington Post had reprimanded the regulator for allowing bank executives to pocket huge bonuses amid bank failures.

e$)$ The financial controller has rejected a RM$20$ million investment project that can increase the company$$s current profit of RM$18$ million to RM$23$ million after one year, RM$28$ million after two years and RM$22$ million after three years.