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I was rushing through this question, could even remember not reading the whole question properly.... If it actually asked about "rate of change"... the answer would be convexity then...

was it key rate, key rate'01 or key rate duration? "key rate" itself does not mean key rate duration and the changes of share prices following changes in interest rate. I picked Duration as well, do you remember what more information that pointed to key rate?

anyone remembers the question about what a company should do: Monte Carlo ; use Poisson distribution to calculate ; use information of other companies...?

I don't think it is wrong. I think the answer should be Sharpe. Treynor uses Beta, which is relative to the market, and both Sortino and Information ratio requires some sort of threshold/benchmark The question that seems to confuse most is the one about buying 8,000,000 at 0.9, and for some...

This question was a purely probability question for me. I basically ignored the "backtesting" term and just calculated just as you demonstrated.

any help with these two questions?

There was a 2-question set about hedging with futures and options. The first question is about the value of option contracts if I remember correctly, and the second one is what you should do if price increases and other factors stay the same. What is your take? I also have no clue of the answer...