Well, fully vested as in I own all of it but it is mutual funds and stocks so I would need to sell them before I had the value in cash. Selling takes less than a day. Would this count?
The key is that the account can be accessed immediately, and the language is important. The bank will need to provide a letter that specifies the terms of the account. If they aren't considered immediately accessible, you would have to look at moving them to a savings account. Some of the more experienced members may have suggestions based on the different types of investment accounts and any refusals they've seen.
This is the official guidance:
11A. In respect of cash savings:
(a) The savings may be held in any form of bank/savings account (whether a current, deposit or investment account, provided by a financial institution regulated by the appropriate regulatory body for the country in which that institution is operating), provided that the account allows the savings to be accessed immediately (with or without a penalty for withdrawing funds without notice). This can include savings held in a pension savings account which can be immediately withdrawn.
(b) Paid out competition winnings or a legacy which has been paid can contribute to cash savings.
(c) Funds held as cash savings by the applicant, their partner or both jointly at the date of application can have been transferred from investments, stocks, shares, bonds or trust funds within the period of 6 months prior to the date of application, provided that:
(i) The funds have been in the ownership and under the control of the applicant, their partner or both jointly for at least the period of 6 months prior to the date of application.
(ii) The ownership of the funds in the form of investments, stocks, shares, bonds or trust funds; the cash value of the funds in that form at or before the beginning of the period of 6 months prior to the date of application; and the transfer of the funds into cash, are evidenced by a portfolio report or other relevant documentation from a financial institution regulated by the appropriate regulatory body for the country in which that institution is operating.
(iii) The requirements of this Appendix in respect of the cash savings held at the date of application are met, except that the period of 6 months prior to the date of application in paragraph 11(a) will be reduced by the amount of that period in which the relevant funds were held in the form of investments, stocks, shares, bonds or trust funds.
(iv) For the purposes of sub-paragraph 11A(c), “investments” includes funds held in an investment account or pension account or fund which does not meet the requirements of paragraphs 11 and 11A(a).