电池板块走强，创业板指涨近2%，创业板ETF（159915）成交活跃

Group 1 - The core viewpoint of the news is that the ChiNext market has seen significant gains driven by strong performance in the battery and photovoltaic equipment sectors, with the ChiNext Growth Index rising by 2.6% and the ChiNext 200 Index increasing by 2.1% as of midday [1] - The ChiNext ETF (159915) recorded a trading volume of nearly 2 billion yuan during the half-day session, indicating robust investor interest [1] - The ChiNext Index consists of 100 stocks with large market capitalization and good liquidity, with a high proportion of strategic emerging industries, including power equipment, pharmaceuticals, and electronics, which together account for over 55% of the index [3] Group 2 - The ChiNext 200 ETF managed by E Fund tracks the ChiNext 200 Index, which is composed of 200 stocks with medium market capitalization and good liquidity [3]