FTSE 100 reflects its constituent companies and the way they are weighted. Read market news through that composition rather than assuming every stock index represents the same exposure.
What moves the benchmark?
Global earnings, commodity prices, interest rates and sterling can affect the benchmark. Banks, resource businesses and internationally active companies respond differently to the same shock. A weaker pound may increase the sterling translation of overseas profits, but can also reflect a less favorable economic environment. The net index response depends on company exposures and what caused the currency move.
Does it match your portfolio?
The FTSE 100 may be an imperfect hedge for a portfolio of UK-focused smaller businesses or for a global portfolio valued in another currency. Investors using a non-sterling account face a second conversion when translating option gains or losses. Keep that account-currency effect separate from the sterling cash payoff defined by the option contract.
News versus expectations
An earnings increase can still disappoint investors if a larger rise was expected. Interest rates affect both financing costs and valuations, but stronger growth can improve profits at the same time. Read the price response alongside what the market had anticipated.
From a view to an option
A correct direction forecast does not establish a profitable option trade. The move must arrive while the option remains active and be large enough to recover its premium. Implied volatility can fall after a major event, reducing resale value even when the index moves favourably.
FTSE 100 Index Options — Return to the call and put examples.
References
ICE FTSE 100 index option specification · ICE FTSE equity derivatives