What factors affect the price of a US stock warrant?

Assuming other factors remain constant,

(1) More out-of the money for (Higher strike for Call warrants / Lower strike for Put warrants）: Warrant price will decrease

(2) Underlying price increase: Call warrant price will increase; while Put warrant price will decrease

(3) Longer maturity: both Call and Put warrant price will increase

(4) Implied volatility increase: both Call and Put warrant price will increase

(5) Interest rate increase: Call warrant price will increase; while Put warrant price will decrease

(6) Dividend higher than expectation: Call warrant price will increase; while Put warrant price will decrease

(7) Lower liquidity of underlying may widen the bid-ask spread of the warrants or reduce the liquidity of the warrants provided by the issuer

(8) The higher the outstanding ratio, the market force may impact the warrant price more. When the warrants are 100% sold, issuers cannot provide an ask quote, leading to possible deviation of the warrant market price from its fair price.

(9) The better the issuer’s Liquidity Provision Quality (LPQ), the smaller the bid-ask spread and the more the liquidity of the warrants. Investor may trade the warrant at a price closer to its fair price.

US stock warrants will also subject to the following:

(10) The financial cost and/ or potential taxation concern when trading or hedging the US underlying.

(11) If the product is denominated in HKD: the exchange rate change between USD and HKD.