https://www.sec.gov.lk/wp-content/uploads/2021/09/PL-012514-E-Securities.pdf
Stock market manipulations
Section 129.
(1) A person shall not carry out or be involved in carrying out, either directly or indirectly, one or more transactions in securities of a company being transactions that have or are likely to have the effect of artificially-
(a) raising;
(b) lowering; or
(c) pegging, fixing, maintaining or stabilizing, the price or volume of securities of that company traded on an exchange licensed by the Commission or a platform operated by a recognised market operator, for the purpose of inducing other persons whether or not such person is actually induced to acquire or dispose of the securities of the company or of a related company.
(2) A reference in this section to a transaction in relation to securities of a company traded on an exchange licensed by the Commission or a platform operated by a recognised market operator includes–
(a) the making of an offer to sell or purchase such securities of the company; and
(b)the making of an invitation, that expressly or impliedly invites a person to offer to sell or purchase such securities of the company.
147. (1) A person who contravenes sections 128, 129, 130, 131, 132 or subsections (2) and (3) of section 137 commits an offence and shall be liable on conviction to a fine of not less than ten million rupees or to imprisonment for a term not exceeding ten years or to both such fine and imprisonment.