try to raise the price of stocks through speculative buying(verb.possession)
source: wordnet30
speak insincerely or without regard for facts or truths(verb.communication)
source: wordnet30
advance in price(verb.change)
Example: Stocks were bulling.
source: wordnet30
To be in heat; to manifest sexual desire as cows do.(verb)
source: webster1913
To endeavor to raise the market price of; as, to bull railroad bonds; to bull stocks; to bull Lake Shore; to endeavor to raise prices in; as, to bull the market. See 1st Bull, n., 4.(verb)