Critical Reasoning (CR) | Re: Corporate officers and directors commonly buy and sell, for their own

let us break the argument down -

inside sales / inside purchases < 2 ---> Rise in stock prices.

(this seems quite likely because for the ratio to drop below 2, the denominator "inside purchases" has to increase relative to the numerator. this might send a signal to investors that the stock is healthy. Hence, the rise in stock prices)

the argument tells us another fact -

inside sales / inside purchases = 1/9 (<2).

What inferences can we draw from this? Any answer